List of Asters and Sunflowers of Montana
Encyclopedia
Asterales
Asterales is an order of dicotyledonous flowering plants that includes the composite family and its related families.The order is a cosmopolite, and includes mostly herbaceous species, although a small number of trees and shrubs are also present.The Asterales can be characterized on the...
found in Montana
Montana
Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...
. Some of these species are exotics
Introduced species
An introduced species — or neozoon, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its indigenous or native distributional range, and has arrived in an ecosystem or plant community by human activity, either deliberate or accidental...
(not native to Montana) and some species have been designated as Species of Concern.
- Albert's hawkweed, Hieracium scouleri var. albertinum
- Alkali Marsh Aster, Almutaster pauciflorus
- Alkali Sagebrush, Artemisia longiloba
- Alkali-marsh RagwortSenecio hydrophilusSenecio hydrophilus is a species of flowering plant in the aster family known by the common names water ragwort and alkali marsh groundsel. It is native to western North America from British Columbia to California to Colorado, where it grows in swampy places such as marshes. It can grow in standing...
, Senecio hydrophilus - Alpine dandelion, Taraxacum lyratum
- Alpine HawkweedHieracium gracileHieracium gracile is a species of hawkweed known by the common name slender hawkweed. It is native to much of the northwestern United States and parts of British Columbia, where it grows in moist mountain forests. Two varieties are native to Alaska...
, Hieracium gracile - Alpine HulseaHulsea algidaHulsea algida is a species of flowering plant in the daisy family known by the common name Pacific hulsea or Alpine gold. It is native to the western United States from California to Montana where it grows in alpine and subalpine talus habitats. This is a hairy, glandular perennial herb producing...
, Hulsea algida - Alpine leafy-bract aster, Symphyotrichum foliaceum var. apricum
- Alpine PussytoesAntennaria alpinaAntennaria alpina is a species in genus Antennaria, native to subarctic regions of the Northern Hemisphere, and extending south at high altitudes in mountains in Scandinavia, and in the Rocky Mountains south to Montana.It is a herbaceous perennial plant growing to 15 cm tall, with off-white...
, Antennaria alpina - Alpine Sagebrush, Artemisia scopulorum
- American Saw-wortSaussurea americanaSaussurea americana is a species of flowering plant in the aster family known by the common name American saw-wort. It is native to northwestern North America from Alaska to far northern California to Montana, where it grows in mountain habitat, such as meadows and forests...
, Saussurea americana - American TrailplantAdenocaulon bicolorAdenocaulon bicolor is a flowering plant in the daisy family known as American trailplant. It is found in southern Canada and across the northern and western United States. This plant has a very thin erect branching stem surrounded by triangular leaves only at the base...
, Adenocaulon bicolor - Anderson's Aster, Oreostemma alpigenum
- Annual AgoserisAgoseris heterophyllaAgoseris heterophylla is a liguliferous species in the Asteraceae or sunflower family known by the common name annual agoseris. It is widespread in mostly drier regions of western North America. This is an annual herb producing a basal rosette of leaves. Often there is no stem, or a short,...
, Agoseris heterophylla - Annual RagweedAmbrosia artemisiifoliaAmbrosia artemisiifolia, Common Ragweed, is the most widespread plant of the genus Ambrosia in North America. It has also been called Annual Ragweed, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Roman Wormwood, Stammerwort, Stickweed, Tassel Weed, and American Wormwood...
, Ambrosia artemisiifolia - Annual WormwoodArtemisia annuaArtemisia annua, also known as Sweet Wormwood, Sweet Annie, Sweet Sagewort or Annual Wormwood , is a common type of wormwood that is native to temperate Asia, but naturalized throughout the world.-Characteristics:...
, Artemisia annua - Arctic AsterEurybia sibiricaEurybia sibirica, commonly known as the Siberian aster or arctic aster, is an herbaceous perennial native to north western North America and northern Eurasia, stretching from Scandinavia to Canada. It is found largely in open areas of subarctic boreal forests, though it is also found in a wide...
, Eurybia sibirica - Arctic sweet coltsfootPetasites frigidusPetasites frigidus is a species of Petasites native to Arctic to cool temperate regions of the Northern Hemisphere in northern Europe, northern Asia and northern North America.It is a herbaceous perennial plant producing flowering stems in early spring, and large leaves through the summer...
, Petasites frigidus - Arctic sweet coltsfoot, Petasites frigidus var. frigidus
- Aromatic Aster, Symphyotrichum oblongifolium
- Aromatic Pussytoes, Antennaria aromatica
- Arrow-leaf GroundselSenecio triangularisSenecio triangularis, known as arrowleaf groundsel and arrowleaf butterweed, is a species of the genus Senecio and family Asteraceae.-Distribution:Native:...
, Senecio triangularis - Arrow-leaf Rattlesnake-root, Prenanthes sagittata
- Arrowleaf BalsamrootBalsamorhiza sagittataBalsamorhiza sagittata is a species of flowering plant in the sunflower tribe of the plant family Asteraceae known by the common name arrowleaf balsamroot. It is native to much of western North America from British Columbia to California to the Dakotas, where it grows in many types of habitat from...
, Balsamorhiza sagittata - Arrowleaf sweet coltsfoot, Petasites frigidus var. sagittatus
- Aspen Fleabane, Erigeron speciosus
- Baby Goldenrod, Solidago nana
- Balsam Ragwort, Senecio pauperculus
- Basin Big Sagebrush, Artemisia tridentata ssp. tridentata
- Basin Daisy, Platyschkuhria integrifolia
- Bear River Fleabane, Erigeron ursinus
- Beartooth Large-flowered Goldenweed, Pyrrocoma carthamoides var. subsquarrosa
- Beautiful Fleabane, Erigeron formosissimus
- Beck Water-marigold, Bidens beckii
- Biennial WormwoodArtemisia biennisArtemisia biennis is a species of sagebrush known by the common name biennial wormwood. It is native to Europe.-Description:This is an annual or biennial herb producing a single erect green to reddish stem up to 2 meters in maximum height. It is generally hairless and unscented...
, Artemisia biennis - Big Horn Fleabane, Erigeron allocotus
- Big SagebrushArtemisia tridentataArtemisia tridentata is a shrub or small tree from the family Asteraceae. Some botanists treat it in the segregate genus Seriphidium, as S. tridentatum W. A. Weber, but this is not widely followed...
, Artemisia tridentata - Big-head Evax, Evax prolifera
- Bird's-foot Sagebrush, Artemisia pedatifida
- Bitter Fleabane, Erigeron acris
- Bitter Fleabane, Erigeron acris ssp. debilis
- Bitter Fleabane, Erigeron acris ssp. kamtschaticus
- Black Hairy False-dandelion, Nothocalais nigrescens
- Black SagebrushArtemisia novaArtemisia nova is a species of sagebrush known by the common name black sagebrush.It is native to the western United States from California to Montana to New Mexico, where it grows in forest, woodland, and grassland habitats. It is "one of the most common shrubs in the western United States"...
, Artemisia nova - Black StarthistleCentaurea nigraCentaurea nigra is a species of flowering plant in the daisy family known by the common names Lesser Knapweed, Common Knapweed and Black Knapweed...
, Centaurea nigra - Black-tip Groundsel, Senecio lugens
- Blackeyed SusanRudbeckia hirtaRudbeckia hirta, the Black-eyed Susan, with the other common names of: Brown-eyed Susan, Brown Betty, Brown Daisy , Gloriosa Daisy, Golden Jerusalem, Poorland Daisy, Yellow Daisy, and Yellow Ox-eye Daisy. It is a flowering plant in the family Asteraceae...
, Rudbeckia hirta - Border Goldthread, Thelesperma subnudum
- Boreal Aster, Symphyotrichum boreale
- Boreal Field Sagewort, Artemisia campestris ssp. borealis
- Boreal WormwoodArtemisia norvegicaArtemisia norvegica is a species of flowering plant in the aster family known by the common names alpine sagewort, boreal sagewort, mountain sagewort, Norwegian mugwort, arctic wormwood, and spruce wormwood...
, Artemisia norvegica - Bristly Hawk's-beard, Crepis setosa
- Broom SnakeweedGutierrezia sarothraeGutierrezia sarothrae is a species of flowering plant in the daisy family known by the common names broom snakeweed and perennial matchweed. It is native to much of the western half of North America, from central Canada to northern Mexico...
, Gutierrezia sarothrae - Brown StarthistleCentaurea jaceaCentaurea jacea is a species of herbaceous perennial plants in the genus Centaurea native to dry meadows and open woodland throughout Europe...
, Centaurea jacea - BudsageArtemisia spinescensArtemisia spinescens is a species of sagebrush known by the common name budsage.It is often treated separately from genus Artemisia and named Picrothamnus desertorum, but this separation has not been confirmed by genetic analysis...
, Artemisia spinescens - Buff Fleabane, Erigeron ochroleucus
- Buff Fleabane, Erigeron ochroleucus var. scribneri
- Buff fleabane, Erigeron ochroleucus var. ochroleucus
- Bull ThistleCirsium vulgareCirsium vulgare is a species of the genus Cirsium, native throughout most of Europe , western Asia , and northwestern Africa...
, Cirsium vulgare - Caespitose Fleabane, Erigeron caespitosus
- Canada GoldenrodSolidago canadensisSolidago canadensis is an herbaceous perennial plant of the family Asteraceae native to North America. It is often grown as a wildflower....
, Solidago canadensis - Canada HorseweedConyza canadensisConyza canadensis is an annual plant native throughout most of North America and Central America. Common names include Horseweed, Canadian Horseweed, Canadian Fleabane, Coltstail, Marestail and Butterweed.It is an annual plant growing to 1.5 m tall, with sparsely hairy stems...
, Conyza canadensis - Canada LettuceLactuca canadensisLactuca canadensis is a species of wild lettuce known by the common name Canada lettuce, or Canada wild lettuce. It is native to much of North America, especially in eastern regions, but it can be found all across the continent, having been introduced widely...
, Lactuca canadensis - Canada ThistleCirsium arvenseCirsium arvense is a species of Cirsium, native throughout Europe and northern Asia, and widely introduced elsewhere. The standard English name in its native area is Creeping Thistle.-Alternate names:...
, Cirsium arvense - Chicken-sage, Sphaeromeria argentea
- Chicory, Cichorium intybus
- Clasping Groundsel, Senecio amplectens
- Cleft-leaf Groundsel, Senecio cymbalarioides
- Coarse Sumpweed, Iva xanthifolia
- CoastmaryTanacetum balsamitaTanacetum balsamita, or Balsamita vulgaris, is a perennial temperate herb known as costmary, alecost, balsam herb, bible leaf, or mint geranium....
, Tanacetum balsamita - Columbia Ragwort, Senecio integerrimus var. exaltatus
- Columbia River Wormwood, Artemisia lindleyana
- Common dandelionTaraxacum officinaleTaraxacum officinale, the common dandelion , is a herbaceous perennial plant of the family Asteraceae . It can be found growing in temperate regions of the world, in lawns, on roadsides, on disturbed banks and shores of water ways, and other areas with moist soils. T...
, Taraxacum officinale - Common Groundsel, Senecio vulgaris
- Common Nipplewort, Lapsana communis
- Common SneezeweedHelenium autumnaleHelenium autumnale is a flowering plant native to North America. Common names include common sneezeweed and large-flowered sneezeweed.-Natural habitat and distribution:...
, Helenium autumnale - Common SowthistleSonchus oleraceusSonchus oleraceus is a medicinal plant native to Asia and Europe, which is nutritious food for humans and most livestock.- Nutritive qualities :The common name Sow thistle refers to its...
, Sonchus oleraceus - Common Sunflower, Helianthus annuus
- Common Tansy, Tanacetum vulgare
- Common Woolly Sunflower, Eriophyllum lanatum var. integrifolium
- Common Woolly-sunflower, Eriophyllum lanatum
- Common Woolly-sunflower, Eriophyllum lanatum var. lanatum
- Common WormwoodArtemisia absinthiumArtemisia absinthium is a species of wormwood, native to temperate regions of Eurasia and northern Africa....
, Artemisia absinthium - Common Yarrow, Achillea millefolium
- Corn CamomileAnthemis arvensisAnthemis arvensis, which is also known as corn chamomile or mayweed, scentless chamomile, and # field chamomile, anthémis des champs, fausse camomille, Ackerkamille, camomila-do-campo , manzanilla silvestre is a species of the genus Anthemis and in the Asteraceae family...
, Anthemis arvensis - Cotton-batting Cudweed, Gnaphalium stramineum
- Coulter FleabaneErigeron coulteriErigeron coulteri is a species of flowering plant in the daisy family known by the common names large mountain fleabane and Coulter's daisy....
, Erigeron coulteri - Curlycup GumweedGrindelia squarrosaGrindelia squarrosa is a small North American biennial or short-lived perennial plant which grows to a height of 90 cm and bears yellow flowers from June to September. It was discovered by Lewis and Clark and before that it had been used by Great Plains Tribes as a medicinal herb.-External...
, Grindelia squarrosa - Cushion Townsend-daisyTownsendia condensataTownsendia condensata is a species of flowering plant in the aster family known by the common name cushion Townsend daisy. It is native to North America where it is known from many scattered occurrences in the mountains of the western United States and Alberta in Canada...
, Townsendia condensata - Cusick's Aster, Symphyotrichum cusickii
- Cut-leaved ConeflowerRudbeckia laciniataThe Cutleaf, Cutleaf Coneflower, Goldenglow, Green-headed Coneflower, Tall Coneflower or, Thimbleweed is a large perennial forb, native to Eastern North America, most often found in flood plains and moist soils. This plant grows up to 3 meters tall, with slightly glaucous leaves, and composite...
, Rudbeckia laciniata - Cutleaf FleabaneErigeron compositusErigeron compositus, also known as Dwarf Mountain Fleabane, Cutleaf Daisy, and Trifid Mountain Fleabane, is a flowering plant in the genus Erigeron native to western North America to Greenland and eastern Canada....
, Erigeron compositus - Daisy FleabaneErigeron strigosusErigeron strigosus is a species of flowering plant in the daisy family known by the common name plains fleabane.It is native to eastern North America, and it is present in western North America as a somewhat weedy naturalized species. This is an annual or biennial daisy reaching heights of anywhere...
, Erigeron strigosus - Dense-leaved Pussytoes, Antennaria densifolia
- Desert Dandelion, Malacothrix torreyi
- Desert Groundsel, Senecio eremophilus
- Desert wirelettuce, Stephanomeria runcinata
- Devil's BeggarticksBidens frondosaDevil's Beggarticks is an annual herb in the family Asteraceae, native to North America. It is known by a variety of different names, including Common Beggarticks, Common Tickseed, Large-leaved Beggarticks, Devil's Bootjack, Devil's Pitchfork, and Pitchfork Weed.It is up to 2 m tall, usually with...
, Bidens frondosa - Diffuse Knapweed, Centaurea diffusa
- Dotted blazing starLiatris punctataLiatris punctata is a species of flowering plant in the aster family known by the common names dotted gayfeather, dotted blazingstar, and narrow-leaved blazingstar. It is native to North America, where it occurs throughout the plains of central Canada, the central United States, and northern...
, Liatris punctata - Douglas's Aster, Symphyotrichum subspicatum
- Dusty maidenChaenactis douglasiiChaenactis douglasii is a species of flowering plant in the daisy family known by the common name Douglas' dustymaiden. It is native to western North America from British Columbia to Saskatchewan to California to New Mexico, where it grows in a wide variety of habitats, including harsh environments...
, Chaenactis douglasii - Hoary Pincushion, Chaenactis alpina
- Dwarf Alpine Hawk's-beardCrepis nanaCrepis nana is a species of flowering plant in the daisy family known by the common name dwarf alpine hawksbeard. It is native to much of northern North America and northern Asia, where it is a plant of the alpine climate and maritime regions across the Arctic. It grows in scree, on gravelly...
, Crepis nana - Dwarf GoldenweedEricameria nanaEricameria nana is a species of flowering shrub in the daisy family known by the common names dwarf goldenbush and rubberweed. This plant is native to the western United States from California to Idaho, where it grows along cliffs and rocky hillsides. This is a small shrub rarely reaching a maximum...
, Ericameria nana - Dwarf SagebrushArtemisia arbusculaArtemisia arbuscula is a species of sagebrush known by the common names little sagebrush, low sagebrush, or black sagebrush....
, Artemisia arbuscula - Dwarf Saw-wort, Saussurea densa
- Dwarf woolly-headsPsilocarphus brevissimusPsilocarphus brevissimus is a species of flowering plant in the aster family known by the common name short woollyheads. It is native to western North America from southwestern Canada, California, to northwestern Mexico, as well as southern South America, where it grows in moist flats, such as...
, Psilocarphus brevissimus - Eaton's AsterSymphyotrichum eatoniiSymphyotrichum eatonii is a species of aster known by the common name Eaton's aster. It is native to much of western North America from British Columbia to Saskatchewan, the Sierra Nevada in California, the Rocky Mountains region, to Arizona and New Mexico, where it grows in many habitat types,...
, Symphyotrichum eatonii - Eaton's FleabaneErigeron eatoniiErigeron eatonii is a species of flowering plant in the daisy family known by the common name Eaton's fleabane.This wildflower is native to much of the western United States where it grows in many habitats from grassland to scrub to woodland. It is a small perennial daisy reaching a maximum height...
, Erigeron eatonii - Eaton's Thistle, Cirsium eatonii
- Elegant Aster, Eucephalus elegans
- Elegant Groundsel, Senecio indecorus
- Elegant Hawk's-beardCrepis elegansCrepis elegans, the elegant hawksbeard, is a plant species in the genus Crepis found in North America.-See also:* List of Canadian plants by family A* List of Asters and Sunflowers of Montana-External links:* *...
, Crepis elegans - Elmer's Ragwort, Senecio elmeri
- Engelmann's AsterEucephalus engelmanniiEucephalus engelmannii is a species of aster known by the common name Engelmann's aster. It is native to western North America from British Columbia to California to Colorado, where it grows in mountain woods and meadows...
, Eucephalus engelmannii - Entire-leaf Goldenweed, Pyrrocoma integrifolia
- Entire-leaf RagwortSenecio integerrimusSenecio integerrimus is a species of flowering plant in the aster family known by the common names lambstongue ragwort and tall western groundsel. It is native to western and central North America, where it grows in grassland, forest, and other habitat...
, Senecio integerrimus - Evermann Fleabane, Erigeron evermannii
- False Chamomile, Matricaria maritima
- Fan-leaved Fleabane, Erigeron flabellifolius
- Fascicled Ironweed, Vernonia fasciculata ssp. corymbosa
- Fetid Dogweed, Dyssodia papposa
- Feverfew, Tanacetum parthenium
- Few-flowered Butterweed, Senecio pauciflorus
- Fiddleleaf Hawksbeard, Crepis runcinata ssp. runcinata
- Fiddleleaf Hawksbeard, Crepis runcinata ssp. glauca
- Fiddleleaf Hawksbeard, Crepis runcinata ssp. hispidulosa
- Field Fluffweed, Filago arvensis
- Field GoldenrodSolidago nemoralisSolidago nemoralis, or Gray Goldenrod, is a flowering plant in the United States....
, Solidago nemoralis - Field Pussytoes, Antennaria neglecta
- Field SagewortArtemisia campestrisArtemisia campestris L. is a species of herbaceous biennial or perennial plants in the genus Artemisia that grows in open sites on dry sandy soils throughout the Boreal Kingdom.-External links:** in Flora of North America...
, Artemisia campestris - Field Sagewort, Artemisia campestris ssp. caudata
- Field SowthistleSonchus arvensisSonchus arvensis is a medicinal plant. It is an invasive species in the Great Lakes region and was first sited in 1865.-External links:** Photos, Drawings, Text...
, Sonchus arvensis - Field Sowthistle, Sonchus arvensis ssp. arvensis
- Field Sowthistle, Sonchus arvensis ssp. uliginosus
- Fine-leaved HymenopappusHymenopappus filifoliusHymenopappus filifolius is a species of flowering plant in the daisy family known by the common names fineleaf hymenopappus and Columbia cutleaf. It is native to western North America from west central Canada to northern Mexico. It grows in a number of habitats, often in arid regions...
, Hymenopappus filifolius - Flat-spine BursageAmbrosia acanthicarpaAmbrosia acanthicarpa is a species of ragweed known by the common names flatspine burr ragweed, annual burrweed, and annual bur-sage....
, Ambrosia acanthicarpa - Flat-top Fragrant GoldenrodEuthamia graminifoliaEuthamia graminifolia is a plant in the daisy family, Asteraceae.It is native to much of North America, and also has introduced populations in Europe and Asia.-Description:...
, Euthamia graminifolia - Flodman's Thistle, Cirsium flodmanii
- Fremont's RagwortSenecio fremontiiSenecio fremontii is a species of the genus Senecio and family Asteraceae. It takes its scientific name from John C. Frémont....
, Senecio fremontii - Fringed Blue Aster, Symphyotrichum ciliolatum
- Fringed QuickweedGalinsoga quadriradiataGalinsoga quadriradiata is a species of flowering plant in the daisy family which is known by several common names, including shaggy soldier, hairy galinsoga, and fringed quickweed. It is found throughout most of the temperate world, but apparently its native home is Mexico. In Portuguese-speaking...
, Galinsoga quadriradiata - Fringed Sage, Artemisia frigida
- Garden Cornflower, Centaurea cyanus
- Giant GoldenrodSolidago giganteaSolidago gigantea is a plant species in the genus Solidago. Its common name is giant goldenrod.It is the state flower of Kentucky and Nebraska.-External links:****...
, Solidago gigantea - Glaucous Rattlesnake-root, Prenanthes racemosa
- Golden CamomileAnthemis tinctoriaCota tinctoria, or Golden Marguerite and Yellow Chamomile, is a species in the genus Anthemis of the Sunflower family ....
, Anthemis tinctoria - Golden CrownbeardVerbesina encelioidesVerbesina encelioides is a flowering plant in the family Asteraceae. The species is native to the United States and Mexico. It is naturalized in the Middle East, Spain, Argentina, Australia and the Pacific islands....
, Verbesina encelioides - Golden Tickseed, Coreopsis tinctoria
- Grassy TarweedMadia gracilisMadia gracilis is a species of flowering plant in the aster family known by the common names grassy tarweed and slender tarweed.-Range:...
, Madia gracilis - Gray Aster, Eurybia glauca
- Gray Green Thistle, Cirsium canovirens
- Gray Hawk's-beardCrepis occidentalisCrepis occidentalis is a species of flowering plant in the daisy family known by the common name largeflower hawksbeard. It is native to most of western North America, where it grows in many types of habitat. It is a perennial herb growing a grayish woolly branching stem to about 40 centimeters in...
, Crepis occidentalis - Gray HorsebrushTetradymia canescensTetradymia argyraea is a species of flowering plant in the aster family known by the common names spineless horsebrush and gray horsebrush. It is native to western North America from British Columbia to California to New Mexico, where it grows in sagebrush, woodlands, forest, scrubby open plains,...
, Tetradymia canescens - Great Blanket-flowerGaillardia aristataGaillardia aristata is a species of flowering plant in the sunflower family known by the common names common blanketflower and common gaillardia....
, Gaillardia aristata - Great Northern AsterCanadanthus modestusCanadanthus modestus is a genus of flowering plants in the daisy family, Asteraceae....
, Canadanthus modestus - Great Plains Goldenrod, Solidago canadensis var. gilvocanescens
- Great RagweedAmbrosia trifidaCommon names: Buffalo Weed, Great Ragweed, Giant Ragweed, Bitterweed, Bloodweed, Horse Cane, Tall AmbrosiaAmbrosia trifida is an annual plant in the aster family, native throughout much of North America. Its flowers are green and are pollinated by wind rather than by insects, and the pollen is one...
, Ambrosia trifida - Great StarthistleCentaurea scabiosaCentaurea scabiosa or Greater Knapweed is a perennial plant of the genus Centaurea. It is native to Europe and bears purple flower heads.Greater knapweed is found growing in dry grasslands, hedgerows and cliffs on lime-rich soil...
, Centaurea scabiosa - Greater Burdock, Arctium lappa
- Hairy ArnicaArnica mollisArnica mollis is a species of arnica known by the common name hairy arnica. It is native to western North America from Alaska to California to Colorado, where it grows in subalpine mountain habitat such as meadows and streambanks....
, Arnica mollis - Hairy Cat's-ear, Hypochaeris radicata
- Hairy False Goldenaster, Heterotheca villosa var. foliosa
- Hairy False Goldenaster, Heterotheca villosa var. minor
- Hairy False Goldenaster, Heterotheca villosa var. villosa
- Hairy Golden-aster, Heterotheca villosa
- Heart-leaved ArnicaArnica cordifoliaArnica cordifolia is a species of arnica known by the common name heartleaf arnica. It is native to western North America from Alaska to California to New Mexico, and it is distributed as far east as Ontario and Michigan...
, Arnica cordifolia - Henderson's Aster, Symphyotrichum hendersonii
- Hillside ArnicaArnica fulgensArnica fulgens is a species of arnica known by the common names foothill arnica and hillside arnica. It is native to western North America, where it grows in open, grassy areas....
, Arnica fulgens - Hoary Balsamroot, Balsamorhiza incana
- Hoary Tansy-asterMachaeranthera canescensMachaeranthera canescens is a species of flowering plant in the aster family known by the common names hoary tansyaster and hoary-aster. It is native to western and central North America, where it is a common plant in many regions and habitat types...
, Machaeranthera canescens - Hoary Townsend-daisy, Townsendia incana
- Hooker Thistle, Cirsium hookerianum
- Hooker's Balsamroot, Balsamorhiza hookeri
- Hooker's Townsend-daisy, Townsendia hookeri
- Hopi-teaThelesperma megapotamicumThelesperma megapotamicum is a species of flowering plant in the aster family known by the common name Hopi tea greenthread. It is native to sections of the Americas, including the central United States, where it grows in many types of habitat. It is a perennial herb producing a slender, branching...
, Thelesperma megapotamicum - Hound's-tongue Hawkweed, Hieracium scouleri var. griseum
- Howell's Gumweed, Grindelia howellii
- Howell's PussytoesAntennaria howelliiAntennaria howellii is a species in the genus Antennaria, native to northern North America from Alaska east to Newfoundland, and south to northern California, Colorado and North Carolina....
, Antennaria howellii - Hybrid Prairie Sunflower, Helianthus x laetiflorus
- Idaho Fleabane, Erigeron asperugineus
- Idaho Goldenweed, Tonestus aberrans
- riniteurybia aberrans|Haplopappus aberrans,Triniteurybia aberrans
- Idaho GumweedGrindelia nanaGrindelia nana is a species of flowering plant in the daisy family known by the common names Idaho gumplant and Idaho gumweed. It is native to western North America, especially the western United States, where it can be found in a number of dry habitats. This is a weedlike perennial herb growing...
, Grindelia nana - Jackson Hole Thistle, Cirsium subniveum
- Kingdevil, Hieracium praealtum
- Lackschewitz' Fleabane, Erigeron lackschewitzii
- Lambstongue Ragwort, Senecio integerrimus var. integerrimus
- Lance-leaved GoldenweedPyrrocoma lanceolataPyrrocoma lanceolata is a species of flowering plant in the aster family known by the common name lanceleaf goldenweed. It is native to western North America from central Canada to northeastern California to Colorado, where it grows in many types of habitat, including disturbed places and areas...
, Pyrrocoma lanceolata - Large-flower AgoserisAgoseris grandifloraAgoseris grandiflora is a species of flowering plant in the daisy family known by the common names bigflower agoseris and grassland agoseris. It is native to western North America from British Columbia to California to Utah, where it grows in many habitat types...
, Agoseris grandiflora - Large-flower Fleabane, Erigeron grandiflorus
- Large-flower GoldenweedPyrrocoma carthamoidesPyrrocoma carthamoides is a species of flowering plant in the aster family known by the common name largeflower goldenweed. It is native to western North America from British Columbia to northeastern California to Wyoming, where it is known from grassland, woodlands, forests, barren areas, and...
, Pyrrocoma carthamoides - Large-flower Goldenweed, Pyrrocoma carthamoides var. carthamoides
- Large-headed Ragwort, Senecio megacephalus
- Large-leaved Balsamroot, Balsamorhiza macrophylla
- Lava AsterIonactis alpinaIonactis alpina is a species of aster known by the common name lava aster. It is native to western North America from California to Montana, where it grows in dry areas.-Description:...
, Ionactis alpina - Lawn DaisyBellis perennisBellis perennis is a common European species of Daisy, often considered the archetypal species of that name. Many related plants also share the name "Daisy", so to distinguish this species from other daisies it is sometimes qualified as Common Daisy, Lawn Daisy or occasionally English daisy. It is...
, Bellis perennis - Leafy Arnica, Arnica chamissonis
- Leafy Thistle, Cirsium foliosum
- Leafy-bract aster, Symphyotrichum foliaceum var. foliaceum
- Leafy-bracted Aster, Symphyotrichum foliaceum
- Lesser Burdock, Arctium minus
- Linear-leaf FleabaneErigeron linearisErigeron linearis is a species of flowering plant in the daisy family known by the common name desert yellow fleabane.This wildflower is native to western North America from the high mountains of California to northwestern Canada. This is a small clumping perennial daisy reaching a maximum height...
, Erigeron linearis - Linear-leaved whitestem goldenbush, Ericameria discoidea var. linearis
- Little TarweedMadia exiguaMadia exigua is a species of flowering plant in the aster family known by the common names small tarweed and threadstem madia.-Range:...
, Madia exigua - Littleleaf PussytoesAntennaria microphyllaAntennaria microphylla is a stoloniferous perennial forb in the Aster family . It grows from with spoon shaped or oblong leaves; it blossoms from late May to July...
, Antennaria microphylla - Long-leaf ArnicaArnica longifoliaArnica longifolia is a species of arnica known by the common names longleaf arnica and spearleaf arnica. This flowering perennial is native to the forests western North America from Canada and the U.S. Rocky Mountains to the high Sierra Nevada mountains of California.It is a rhizomatous plant...
, Arnica longifolia - Long-styled Thistle, Cirsium longistylum
- Longleaf Fleabane, Erigeron corymbosus
- Longleaf Hawk's-beardCrepis acuminataCrepis acuminata is a species of flowering plant in the daisy family known by the common name tapertip hawksbeard. It is native to the western United States where it grows in many types of open habitat. It is a perennial herb producing a woolly, branching stem up to about 70 centimeters tall from a...
, Crepis acuminata - Longleaf Wormwood, Artemisia longifolia
- Low CudweedGnaphalium uliginosumGnaphalium uliginosum or Marsh Cudweed is an annual plant found on damp, disturbed ground and tracks. It can be found in the British Isles and Europe. It is very common on damp, arable grasslands, paths, and on acid soils.-Description:...
, Gnaphalium uliginosum - Low Fleabane, Erigeron humilis
- Low Golden Aster, Heterotheca villosa var. depressa
- Low PussytoesAntennaria dimorphaAntennaria dimorpha is a species of flowering plant in the daisy family known by the common name low pussytoes. It is native to western North America from British Columbia to California to Nebraska, where it is generally found in dry areas. This is a small mat-forming perennial herb growing in a...
, Antennaria dimorpha - Lyall's goldenweedTonestus lyalliiTonestus lyallii is a species of flowering plant in the aster family known by the common names Lyall's goldenweed and Lyall's serpentweed. It is native to western North America, particularly in the Rocky Mountains and the mountain ranges of the Pacific Northwest with scattered occurrences between...
, Tonestus lyallii - Macoun’s Cudweed, Gnaphalium macounii
- Many-flowered Viguiera, Viguiera multiflora
- Many-stem Goldenweed, Stenotus multicaulis
- Manyhead Hymenopappus, Hymenopappus filifolius var. polycephalus
- Marsh RagwortSenecio congestusSenecio congestus, also known by its common names Swamp Ragwort, Northern Swamp Groundsel, Marsh Fleabane, Marsh Fleawort, Clustered Marsh Ragwort and Mastodon Flower, a herbaceous member of the Asteraceae family and the Senecio genus, can be seen most easily when its bright yellow umbel flowers...
, Senecio congestus - Maximillian SunflowerHelianthus maximilianiHelianthus maximiliani is a species of sunflower known by the common name Maximilian sunflower.Native to much of the eastern half of North America, it is found in parts of the western half as an introduced species. The plant thrives in a number of ecosystems, particularly across the plains in...
, Helianthus maximiliani - MayweedAnthemis cotulaAnthemis cotula, also known as stinking chamomile, is a flowering annual plant with a noticeable and strong odor. The odor is often considered unpleasant, and it is from this that it gains the common epithet "stinking". It is initially native to Europe and North Africa...
, Anthemis cotula - Meadow Goat's-beard, Tragopogon dubius
- Meadow Goat's-beard, Tragopogon pratensis
- Meadow HawkweedHieracium caespitosumHieracium caespitosum...
, Hieracium caespitosum - Meadow PussytoesAntennaria corymbosaAntennaria corymbosa is a species of flowering plant in the daisy family known by the common name flat-top pussytoes. It is native to parts of northwestern North America from central Canada to California to Colorado, where it grows in moist, cool areas such as mountain meadows and riverbanks...
, Antennaria corymbosa - Meadow ThistleCirsium scariosumCirsium scariosum is a species of thistle known by the common names meadow thistle and elk thistle. It is native to much of western North America from Canada to Mexico, where it grows in a variety of habitat types. This is a variable species made up of several geographic races, most of which have...
, Cirsium scariosum - Mediterranean Serpent-root, Scorzonera laciniata
- Michaux's WormwoodArtemisia michauxianaArtemisia michauxiana is a species of wormwood known by the common names Michaux's wormwood and lemon sagewort.It is native to western North America from Yukon to California to Colorado, where it grows in mountain talus habitats in subalpine to alpine climates. This is a rhizomatous perennial herb...
, Artemisia michauxiana - Missouri Goldenrod, Solidago missouriensis
- Mojave brickellbush, Brickellia oblongifolia
- Mountain ArnicaArnica latifoliaArnica latifolia is a species of arnica known by the common names Broadleaf Arnica, Broad Leaved Arnica, Mountain Arnica, and Daffodil Leopardbane...
, Arnica latifolia - Mountain Big Sagebrush, Artemisia tridentata ssp. vaseyana
- Mountain StarthistleCentaurea montanaCentaurea montana is a species of Centaurea endemic to Europe. It is widespread and common in the more southerly mountain ranges of Europe, but is rarer in the north...
, Centaurea montana - Mountain TarweedMadia glomerataMadia glomerata is a species of flowering plant in the aster family known by the common name mountain tarweed.-Range:Madia glomerata is the most widely distributed Madia, its native range covering much of western and northern North America from Alaska to the Southwestern United States, most of...
, Madia glomerata - Musk Thistle, Carduus nutans
- Naked-spike AmbrosiaAmbrosia psilostachyaAmbrosia psilostachya is a species of ragweed known by the common names Cuman ragweed, perennial ragweed, and western ragweed....
, Ambrosia psilostachya - Naked-stem Hawk's-beardCrepis runcinataCrepis runcinata is a species of flowering plant in the daisy family known by the common name fiddleleaf hawksbeard. It is native to western and central North America, where it grows in many types of habitat. It is a variable species with many subspecies...
, Crepis runcinata - Narrow-leaved Purple ConeflowerEchinacea angustifoliaEchinacea angustifolia is a herbaceous plant species in Asteraceae. The plants grow tall with spindle-shaped taproots that are often branched. The stems and leaves are moderately to densely hairy.E. angustifolia blooms late spring to mid summer...
, Echinacea angustifolia - Narrowleaf Arnica, Arnica angustifolia
- Narrowleaf Hawk's-beardCrepis tectorumThe Narrowleaf Hawksbeard, Crepis tectorum, is a annual or winter annual plant ranging from 30-100cm in height. It is an invasive species and during maturity it has one main stem, which is branched, hairless, and leafy. The leaves are arranged in an alternate manner and are less than 0.5 inches...
, Crepis tectorum - Narrowleaf Hawkweed, Hieracium umbellatum
- Narrowleaf wirelettuce, Stephanomeria tenuifolia
- Noble YarrowAchillea nobilisAchillea nobilis is a flowering plant in the Asteraceae family.The species has creamy-whitish yellow colored flowers, and resemble 'Common Yarrow' except with more flowers that are smaller and foliage which is much finer with thin lacy compound leaves...
, Achillea nobilis - Nodding ArnicaArnica parryiArnica parryi is a species of arnica known by the common name Parry's arnica. It is native to western North America from Yukon to California to Colorado, where it is a resident of temperate coniferous forests....
, Arnica parryi - Nodding Beggarticks, Bidens cernua
- Nodding microserisMicroseris nutansMicroseris nutans is a species of flowering plant in the aster family known by the common name nodding microseris. It is native to western North America, including southwestern Canada and much of the western United States, including the Sierra Nevada in California, where it grows in many types of...
, Microseris nutans - Nodding Rockrose, Helianthella quinquenervis
- Northern Mule's-ears, Wyethia amplexicaulis
- Northwestern Groundsel, Senecio conterminus
- Nuttall's PussytoesAntennaria parvifoliaAntennaria parvifolia is a species of flowering plant in the aster family known by the common names Nuttall's pussytoes and small-leaf pussytoes . It is native to North America, where it occurs throughout much of Canada from British Columbia to Ontario, the western and central United States, and...
, Antennaria parvifolia - Nuttall's Sunflower, Helianthus nuttallii
- Old-Man-of-the-Mountain, Hymenoxys grandiflora
- One-stem Fleabane, Erigeron simplex
- Oppositeleaf False Bahia, Picradeniopsis oppositifolia
- Orange AgoserisAgoseris aurantiacaAgoseris aurantiaca is a liguliferous species in the Asteraceae or sunflower family, and is commonly called orange agoseris or mountain dandelion. It is widespread and common in western North America from Alaska and western Canada southward to California, Arizona, and New Mexico...
, Agoseris aurantiaca - Orange Hawkweed, Hieracium aurantiacum
- Orange Sneezeweed, Helenium hoopesii
- Oxeye Daisy, Leucanthemum vulgare
- Pale Agoseris, Agoseris glauca var. dasycephala
- Pale Agoseris, Agoseris glauca var. glauca
- Pale AgoserisAgoseris glaucaAgoseris glauca is a species of flowering plant in the daisy family known by the common names pale agoseris, prairie agoseris, and short-beaked agoseris. It is native to northern and western North America from Alaska to Ontario to New Mexico, where it grows in many habitat types. This is a...
, Agoseris glauca - Parry's aster, Symphyotrichum foliaceum var. parryi
- Parry's Fleabane, Erigeron parryi
- Parry's Mountain Rabbitbrush, Ericameria parryi var. montana
- Parry's Rabbitbrush, Ericameria parryi
- Parry's Townsend-daisy, Townsendia parryi
- Payson's Groundsel, Senecio dimorphophyllus var. paysonii
- Pearly EverlastingAnaphalis margaritaceaAnapahlis margaritacea, commonly known as the Western Pearly Everlasting, is a perennial herb in the composite family. Since it is the only North American species it is often simply called Pearly Everlasting in the United States and Canada. However, it is also native in Asia and has been widely...
, Anaphalis margaritacea - Philadelphia FleabaneErigeron philadelphicusErigeron philadelphicus is a plant in the daisy family, Asteraceae. Also known as Skevish or Philadelphia Daisy.- Description :...
, Erigeron philadelphicus - Pineapple-weed Chamomile, Matricaria discoidea
- Pink Agoseris, Agoseris lackschewitzii
- Plantain GoldenweedPyrrocoma unifloraPyrrocoma uniflora is a species of flowering plant in the aster family known by the common name plantain goldenweed. It is native to western North America from central Canada to California to Colorado, where it grows in several types of habitat, including forest and meadows with alkali soils, such...
, Pyrrocoma uniflora - Prairie ConeflowerRatibida columniferaRatibida columnifera, commonly known as Upright Prairie Coneflower or Mexican Hat, is a species of flowering plant in the daisy family, Asteraceae, that is native to much of North America....
, Ratibida columnifera - Prairie False-dandelion, Nothocalais cuspidata
- Prairie Goldenrod, Solidago ptarmicoides
- Prairie Ragwort, Senecio plattensis
- Prairie Sunflower, Helianthus petiolaris
- Prairie Thistle, Cirsium canescens
- Prickly LettuceLactuca serriolaPrickly Lettuce is an annual or biennial plant, slightly foetid, that is commonly considered a weed of orchards, roadsides and field crops. The closest wild relative of cultivated lettuce , it grows throughout the temperate regions of all major continents. The leaves grow along a spiny stem and...
, Lactuca serriola - Purple Cudweed, Gnaphalium purpureum
- Purple Goat's-beard, Tragopogon porrifolius
- Pygmy Goldenweed, Tonestus pygmaeus
- Racemose PussytoesAntennaria racemosaAntennaria racemosa is a species of flowering plant in the daisy family known by the common name raceme pussytoes. It is native to western North America from British Columbia and Alberta to northern California to Wyoming. It grows in mountain forests, generally in moist, partially shaded areas, and...
, Antennaria racemosa - Rayless Alkali Aster, Symphyotrichum ciliatum
- Rayless Arnica, Arnica x diversifolia
- Rayless Tansy-aster, Machaeranthera grindelioides
- Redseed dandelionTaraxacum erythrospermumTaraxacum erythrospermum, known by the common name red-seeded dandelion, is a type of dandelion and is found in much of North America, but most common in the north.It is often considered a variety of Taraxacum laevigatum....
, Taraxacum erythrospermum - Richardson's Bitterweed, Hymenoxys richardsonii
- Rock Groundsel, Senecio werneriifolius
- Rock-tansy, Sphaeromeria capitata
- Rocky Mountain Aster, Ionactis stenomeres
- Rocky Mountain blazing star, Liatris ligulistylis
- Rocky Mountain dandelion, Taraxacum ceratophorum
- Rocky Mountain GoldenrodSolidago multiradiataSolidago multiradiata is a species of goldenrod known by the common names Rocky Mountain goldenrod, northern goldenrod, and alpine goldenrod. It is native to North America, where it can be found throughout the northern regions, including most all of Canada and Alaska, including territory within the...
, Solidago multiradiata - Rocky Mountain Groundsel, Senecio streptanthifolius
- Rocky Mountain PussytoesAntennaria mediaAntennaria media is a species of flowering plant in the daisy family known by the common name Rocky Mountain pussytoes. It is native to western North America from Alaska and northwestern Canada to California to New Mexico, where it grows in cold regions such as the alpine climate of high...
, Antennaria media - Rocky Mountain Rockrose, Helianthella uniflora
- Rosy PussytoesAntennaria roseaAntennaria rosea is a species of flowering plant in the daisy family known by the common name rosy pussytoes. It is native to much of North America, including most of Canada and the western United States. It is a plant of many habitats, from dry to wet climates and low elevation to very high. It is...
, Antennaria rosea - Rough Canada Goldenrod, Solidago canadensis var. salebrosa
- Rough CockleburXanthium strumariumXanthium strumarium is a species of annual plants belonging to the Asteraceae family...
, Xanthium strumarium - Rough Mule's Ears, Wyethia scabra
- Rough-head Groundsel, Senecio sphaerocephalus
- Rubber Rabbitbrush, Ericameria nauseosa
- Running Fleabane, Erigeron flagellaris
- Rush PussytoesAntennaria luzuloidesAntennaria luzuloides is a species of flowering plant in the daisy family known by the common name rush pussytoes. It is native to western North America from British Columbia to California to Colorado, where it grows in dry areas, particularly sagebrush scrub. This is a perennial herb growing...
, Antennaria luzuloides - Rush Skeleton-plant, Lygodesmia juncea
- Rush SkeletonweedChondrilla junceaChondrilla juncea is a species of flowering plant in the Aster family known by a number of common names, including rush skeletonweed, gum succory, devil's grass, and nakedweed...
, Chondrilla juncea - Russian Knapweed, Acroptilon repens
- Rydberg's Fleabane, Erigeron rydbergii
- Sagebrush False dandelionNothocalais troximoidesNothocalais troximoides is a species of flowering plant in the aster family known by the common name sagebrush false dandelion. It is native to western North America, including British Columbia and the northwestern United States, where it grows in sagebrush and other plateau and mountain habitat...
, Nothocalais troximoides - Scabland Sagebrush, Artemisia rigida
- Scotch Thistle, Onopordum acanthium
- Scouler's HawkweedHieracium scouleriHieracium scouleri is a species of hawkweed known by the common name Scouler's woollyweed. It is native to western North America from Manitoba to California, where it grows in a variety of mountainous habitats. This plant produces a basal rosette of long, narrow leaves 10 to 20 centimeters long,...
, Hieracium scouleri - Scouler's Hawkweed, Hieracium scouleri var. scouleri
- Scribner's Ragwort, Senecio integerrimus var. scribneri
- Shaggy Fleabane, Erigeron pumilus
- Short-ray FleabaneErigeron lonchophyllusErigeron lonchophyllus is a species of flowering plant in the aster family known by the common name shortray fleabane. It is native to North America including most all of Canada and the western and north-central United States. It occurs in many types of moist habitat and disturbed areas...
, Erigeron lonchophyllus - Short-spine HorsebrushTetradymia spinosaTetradymia spinosa is a species of flowering plant in the aster family known by the common name shortspine horsebrush. It is native to the western United States, especially the basins and plateaus west of the Rocky Mountains. It grows in sagebrush, woodlands, and scrub habitat, often among...
, Tetradymia spinosa - Short-styled ThistleCirsium brevistylumCirsium brevistylum is a species of thistle known by the common names Indian thistle and clustered thistle. It is native to western North America from southwestern British Columbia to California, where it grows in moist areas in many types of habitat, from mountain forests to chaparral and coastal...
, Cirsium brevistylum - Showy AsterEurybia conspicuaEurybia conspicua, commonly known as the Western Showy Aster, is an herbaceous perennial in the composite family. It is native to northwestern North America and is present in both Canada and the United States....
, Eurybia conspicua - Showy Pussytoes, Antennaria pulcherrima
- Showy Townsend-daisy, Townsendia florifera
- Silky Townsend-daisy, Townsendia exscapa
- Silver SagebrushArtemisia canaArtemisia cana is a species of sagebrush native to western and central North America, having three subspecies. It known by many common names, including silver sagebrush, sticky sagebrush, silver wormwood, hoary sagebrush, and dwarf sagebrush...
, Artemisia cana - Silver Sagebrush, Artemisia cana ssp. cana
- Silver Sagebrush, Artemisia cana ssp. viscidula
- Single-head Goldenweed, Ericameria suffruticosa
- Single-head Pussytoes, Antennaria monocephala
- Siskiyou Hawk's-beardCrepis modocensisCrepis modocensis is a species of flowering plant in the daisy family known by the common name Modoc hawksbeard. It is native to western North America from British Columbia to California to Colorado, where it grows in several types of mountain and plateau habitat, including sagebrush...
, Crepis modocensis - Skeleton-leaf BursageAmbrosia tomentosaAmbrosia tomentosa is a perennial species in the Aster family . This plant grows up to 3 feet tall. The deeply lobed hairy leaves grow to 5 inches and have toothed margins. Flowers are small and yellow and produce spined 2-seeded burrs...
, Ambrosia tomentosa - Slender Fleabane, Erigeron gracilis
- Slender FleabaneErigeron tenerErigeron tener is a species of flowering plant in the daisy family known by the common name slender fleabane. It is native to the western United States, where it grows in mountainous and rocky plateau habitat. This is a small, clumping perennial herb producing a gray-green stem up to about 15...
, Erigeron tener - Slender HareleafLagophylla ramosissimaLagophylla ramosissima is a species of flowering plant in the sunflower family known by the common name branched hareleaf, or branched lagophylla. It is native to the western United States where it can be found in many types of habitat, especially in dry areas. This is an annual herb producing...
, Lagophylla ramosissima - Slender Hawksbeard, Crepis atribarba
- Slender Townsend-daisyTownsendia leptotesTownsendia leptotes is a species of flowering plant in the aster family known by the common name common Townsend daisy. It is native to the western United States, where it grows in the alpine climates of high mountain ranges from California to Montana to New Mexico.This is a petite perennial herb...
, Townsendia leptotes - Small-flower Hawk's-beardCrepis intermediaCrepis intermedia is a species of flowering plant in the daisy family known by the common name limestone hawksbeard. It is native to western North America, where it grows in many types of open and forested habitat. It is a perennial herb growing an erect, multibranched stem from a thick taproot,...
, Crepis intermedia - Small-flowered Marsh-elder, Iva axillaris
- Small-headed Tarweed, Madia minima
- Smallhead Arnica, Arnica latifolia var. gracilis
- Smooth Blue AsterSymphyotrichum laeveSymphyotrichum laeve is a flowering plant native to the United States and North America.-External links:*...
, Symphyotrichum laeve - Smooth Fleabane, Erigeron glabellus
- Smooth Fleabane, Erigeron leiomerus
- Sneezeweed, Achillea ptarmica
- Soft Aster, Symphyotrichum molle
- Spearleaf Rabbitbrush, Lorandersonia linifolia
- Spiny CockleburXanthium spinosumXanthium spinosum is a species of flowering plant in the aster family known by many common names, including spiny cocklebur and prickly burweed. It is known worldwide as a noxious weed that grows in many types of disturbed habitat. Its original native range is not known but it may have come from...
, Xanthium spinosum - Spiny Goldenaster, Machaeranthera pinnatifida
- Spiny Plumeless-thistleCarduus acanthoidesCarduus acanthoides is a species of thistle known as the spiny plumeless thistle and welted thistle. This plant is native to Europe but is well-known in many other parts of the world, including parts of North and South America, New Zealand, and Australia, as a noxious weed. This thistle may exceed...
, Carduus acanthoides - Spiny Skeletonweed, Pleiacanthus spinosus
- Spiny-leaf SowthistleSonchus asperSonchus asper is an annual plant with spiny leaves and yellow flowers resembling those of the dandelion. The leaves are bluish-green, simple, lanceolate, with wavy and sometimes lobed margins, covered in spines on both the margins and beneath...
, Sonchus asper - Spotted Joepye-weed, Eupatorium maculatum
- Spotted Knapweed, Centaurea stoebe
- Spreading FleabaneErigeron divergensErigeron divergens is a flowering plant in the daisy family. Common names include spreading fleabane and branching fleabane. It bears small, attractive daisylike flowers with up to 150 ray flowers, giving the round flowerhead a frilly look. The flowers may be white or a light shade of purple. The...
, Erigeron divergens - Squarrose KnapweedCentaurea virgataCentaurea virgata is a species of Centaurea. It is native to western Asia. The subspecies C. virgata ssp. squarrosa is known as Squarrose Knapweed....
, Centaurea virgata - Stemless Four-nerve-daisy, Hymenoxys acaulis
- Stemless Mock GoldenweedStenotus acaulisStenotus acaulis is a species of flowering plant in the aster family known by the common name stemless mock goldenweed. It is native to the western United States, where it grows in rocky soils in sagebrush plateau and mountain habitats. It is a perennial herb usually forming a compact tuft or mat...
, Stenotus acaulis - Steppe Agoseris, Agoseris parviflora
- Sticky Goldenrod, Solidago simplex
- Sticky-leaf RabbitbrushChrysothamnus viscidiflorusChrysothamnus viscidiflorus is a species of shrub in the daisy family known by the common names yellow rabbitbrush and green rabbitbrush. It is native to western North America, from British Columbia to California to Nebraska, where it grows in sagebrush and woodland habitat. It grows easily in...
, Chrysothamnus viscidiflorus - Stiff Goldenrod, Solidago rigida
- Stiff SunflowerHelianthus pauciflorusThe Stiff Sunflower is an ornamental plant in the Asteraceae family.-External links:*...
, Helianthus pauciflorus - Stream-bank ArnicaArnica amplexicaulisArnica amplexicaulis is a species of arnica known by the common name clasping arnica. It is native to western North America from Alaska to California and the Sierra Nevada, to the Rocky Mountains and Wyoming, where it grows in moist areas such as mountain meadows and streambanks.This is a perennial...
, Arnica amplexicaulis - Streamside Fleabane, Erigeron glabellus var. glabellus
- Streamside Fleabane, Erigeron glabellus var. pubescens
- Subalpine Arnica, Arnica rydbergii
- Subalpine AsterEurybia meritaEurybia merita, commonly known as the subalpine aster or arctic aster , is an herbaceous perennial native to northwestern North America, primarily from the Interior Mountains and Plateau system and Rocky Mountains in Canada, stretching south to Utah and extreme northern California...
, Eurybia merita - Subalpine FleabaneErigeron peregrinusErigeron peregrinus is a species of flowering plant in the daisy family known by the common names subalpine fleabane and wandering daisy....
, Erigeron peregrinus - Sweet Marsh RagwortSenecio hydrophiloidesSenecio hydrophiloides is a species of flowering plant in the aster family known by the common names tall groundsel and sweet marsh ragwort. It is native to western North America from British Columbia and Alberta to northern California to Utah, where it grows in wet meadows and similar habitat...
, Senecio hydrophiloides - Sword Townsend-daisy, Townsendia spathulata
- Tall Blue LettuceLactuca biennisLactuca biennis is a species of wild lettuce known by the common names tall blue lettuce and blue wood lettuce. It is native to the eastern half of the United States and Canada, but it can also be found in much of the western half as an introduced species. This is a biennial herb in the daisy...
, Lactuca biennis - Tall Bur-marigoldBidens vulgataBidens vulgata is a species of flowering plant in the daisy family known by the common name big devils beggartick. It is native to eastern North America, where it is a plant of wetlands. It is an introduced species in much of western North America as well as parts of Europe...
, Bidens vulgata - Tall GroundselSenecio serraSenecio serra is a species of flowering plant in the aster family known by the common name tall ragwort. It is native to the western United States, where it can be found in several types of habitat, including sagebrush and woodlands. It is a perennial herb producing a single erect stem or a cluster...
, Senecio serra - Tall Pussytoes, Antennaria anaphaloides
- Tall woolly-headsPsilocarphus elatiorPsilocarphus elatior is a species of flowering plant in the aster family known by the common names tall woollyheads and meadow woollyheads. It is native to the Pacific Northwest in western North America from Vancouver Island, where it is known from just a few occurrences, to northern California...
, Psilocarphus elatior - Tanseyleaf Tansy-asterMachaeranthera tanacetifoliaMachaeranthera tanacetifolia is a species of flowering plant in the aster family known by the common names tansyleaf tansyaster and Tahoka daisy. It is native to northern Mexico and the southwestern and central United States, where it grows in several types of habitat...
, Machaeranthera tanacetifolia - Tansy Ragwort, Senecio jacobaea
- Taprooted Fleabane, Erigeron radicatus
- Tarragon, Artemisia dracunculus
- Tartarian Lettuce, Lactuca tatarica
- Tasselflower brickellbushBrickellia grandifloraBrickellia grandiflora is a species of flowering plant in the daisy family known by the common name tasselflower brickellbush. It is native to western North America from British Columbia to Missouri to Central Mexico, where it grows in many types of habitat.This is an upright perennial herb growing...
, Brickellia grandiflora - Thick-leaf Groundsel, Senecio crassulus
- Thick-stem AsterEurybia integrifoliaEurybia integrifolia, commonly called the Thickstem Aster, is an herbaceous perennial in the composite family. It is native to the western United States where it occurs in mountainous areas along the Basin and Range Province.-External links:**...
, Eurybia integrifolia - Thoroughwort brickellbush, Brickellia eupatorioides
- Threadleaf Fleabane, Erigeron filifolius
- Three-lobe Beggarticks, Bidens comosa
- Three-nerve Fleabane, Erigeron subtrinervis
- Three-nerved Goldenrod, Solidago velutina
- Three-tip Sagebrush, Artemisia tripartita
- Threetip Sagebrush, Artemisia tripartita ssp. tripartita
- Thrift Mock Goldenweed, Stenotus armerioides
- Tilesius Wormwood, Artemisia tilesii
- Torrey Bitterweed, Hymenoxys torreyana
- Turkish Hawksbeard, Crepis nicaeensis
- Tweedy's Fleabane, Erigeron tweedyi
- Twice-hairy Butterweed, Senecio fuscatus
- Twin ArnicaArnica sororiaArnica sororia is a species of arnica known by the common name twin arnica. It is native to western North America from British Columbia to California to Nebraska, where it grows in many types of habitat....
, Arnica sororia - Two-leaf Ragwort, Senecio dimorphophyllus
- Twoleaf Ragwort, Senecio dimorphophyllus var. dimorphophyllus
- Umber PussytoesAntennaria umbrinellaAntennaria umbrinella is a species of flowering plant in the daisy family known by the common names umber pussytoes and brown pussytoes. It is native to western North America from southwestern Canada to the Sierra Nevada and southern Rocky Mountains...
, Antennaria umbrinella - Velvety Goldenrod, Solidago mollis
- Wavyleaf ThistleCirsium undulatumCirsium undulatum is a species of thistle known by the common names wavyleaf thistle and gray thistle. It is native to much of central and western North America from Canada to Mexico, and present outside of its native range as an introduced species. It is widespread and found in many habitat types....
, Cirsium undulatum - Weak Groundsel, Senecio debilis
- Weber's Saw-wort, Saussurea weberi
- Welsh's Aster, Symphyotrichum welshii
- Western AsterSymphyotrichum ascendensSymphyotrichum ascendens is a species of aster known by the common names western aster and longleaf aster. It is native to western North America from British Columbia to Saskatchewan, the Sierra Nevada in California, to Arizona and New Mexico...
, Symphyotrichum ascendens - Western ConeflowerRudbeckia occidentalisRudbeckia occidentalis is a species of flowering plant in the aster family known by the common name western coneflower. It is native to the northwestern United States from Washington to northern California and east to Wyoming and Montana, where it grows in moist habitat types, such as meadows...
, Rudbeckia occidentalis - Western Fragrant GoldenrodEuthamia occidentalisEuthamia occidentalis is a flowering plant known by the common names western goldentop and western goldenrod. It is a scrubby perennial plant with many green stems which age into a dull brownish-green, small leaves, and plentiful yellowish clusters of flowers...
, Euthamia occidentalis - Western Golden Groundsel, Senecio pseudaureus
- Western Joepye-weed, Eupatorium occidentale
- Western BonesetAgeratina occidentalisAgeratina occidentalis is a species of flowering plant in the daisy family known by the common name western snakeroot or western eupatorium. It is native to the western United States where it grows in several types of habitat. This is a rhizomatous perennial herb growing fuzzy green or purple stems...
, Ageratina occidentalis - Western Lettuce, Lactuca ludoviciana
- Western Marsh CudweedGnaphalium palustreGnaphalium palustre is a species of flowering plant in the daisy family known by the common name western marsh cudweed. It is native to much of western North America, where it is common in many habitats. This is an annual herb growing erect stems which may be short or up to about 30 centimeters...
, Gnaphalium palustre - Western Meadow AsterSymphyotrichum campestreSymphyotrichum campestre is a species of aster known by the common name western meadow aster. It is native to much of western North America from British Columbia, California, and the Rocky Mountains region, to Arizona and New Mexico., where it grows in many habitat types, generally at some...
, Symphyotrichum campestre - Western Mountain Aster, Symphyotrichum spathulatum
- White Cudweed, Gnaphalium microcephalum
- White Heath AsterSymphyotrichum ericoidesSymphyotrichum ericoides, commonly known as the White Aster or Heath Aster, is an herbaceous perennial in the composite family...
, Symphyotrichum ericoides - White Panicle Aster, Symphyotrichum lanceolatum
- White Prairie Aster, Symphyotrichum falcatum
- White SagebrushArtemisia ludovicianaArtemisia ludoviciana is a species of sagebrush known by several common names, including silver wormwood, Louisiana wormwood, white sagebrush, and gray sagewort....
, Artemisia ludoviciana - White Sagebrush, Artemisia ludoviciana ssp. incompta
- White Sagebrush, Artemisia ludoviciana ssp. candicans
- White Sagebrush, Artemisia ludoviciana ssp. ludoviciana
- White-flower HawkweedHieracium albiflorumThe common wildflower Hieracium albiflorum is known by the names white hawkweed and white-flowered hawkweed.It is found in western North America, from Alaska to California and east to the Rockies...
, Hieracium albiflorum - White-head Mule's-ears, Wyethia helianthoides
- Whitestem goldenbushEricameria discoideaEricameria discoidea is a species of flowering shrub in the daisy family known by the common name whitestem goldenbush. This plant is native to the western United States from California to Montana, where it grows in clumpy thickets on rocky slopes. This is a small shrub reaching a maximum height of...
, Ericameria discoidea - Whitestem goldenbush, Ericameria discoidea var. discoidea
- Woody Aster, Xylorhiza glabriuscula
- Woolly FleabaneErigeron lanatusErigeron lanatus is a species of flowering plant in the aster family known by the common name woolly fleabane. It is native to western North America, where it occurs in the mountains straddling the border between British Columbia and Alberta and Montana...
, Erigeron lanatus - Woolly GoldenweedStenotus lanuginosusStenotus lanuginosus is a species of flowering plant in the aster family known by the common name woolly mock goldenweed. It is native to the western United States, especially the inner Pacific Northwest, where it grows in cold, dry regions such as sagebrush plateau and high mountain slopes in...
, Stenotus lanuginosus - Woolly Goldenweed, Stenotus lanuginosus var. andersonii
- Woolly Groundsel, Senecio canus
- Woolly Pussytoes, Antennaria lanata
- Wyoming Big Sagebrush, Artemisia tridentata ssp. wyomingensis
- Wyoming Thistle, Cirsium pulcherrimum
- Wyoming Threetip Sagebrush, Artemisia tripartita ssp. rupicola
- Wyoming Townsend-daisy, Townsendia montana
- Yellow Starthistle, Centaurea solstitialis
- Yellowish Hymenopappus, Hymenopappus filifolius var. luteus