Washingtonia is a
genusIn biology, a genus is a taxonomic unit used in the classification of living and fossil organisms. The term comes from Latin genus "descent, family, type, gender" , cognate with – genos, "race, stock, kin" ..In addition, genus is a taxonomic rank in the hierarchy In biology, a genus (plural:...
of
palmsArecaceae or Palmae , the palm family, is a family of flowering plants, the only family in the monocot order Arecales...
, native to the southwestern
United StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
(in southern
CaliforniaCalifornia is the most populous state in the United States, and the third largest by area. California is the second most populous sub-national entity in the Americas, behind only São Paulo, Brazil...
, southwest
ArizonaThe State of Arizona is a state located in the southwestern region of the United States. The capital and largest city is Phoenix. The second largest city is Tucson, followed in size by the four Phoenix metropolitan area cities of Mesa, Glendale, Chandler, and Scottsdale.Arizona was the 48th and...
) and northwest
MexicoThe United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...
(in northern
Baja CaliforniaBaja California is both the northernmost and westernmost state of Mexico. Before becoming a state in 1953, the area was known as the North Territory of Baja California. It has an area of , or 3.57% of the land mass of Mexico and comprises the northern half of the Baja California peninsula, north...
and
SonoraSonora is a state in northwestern Mexico with an area of 182,052 square kilometers, making it around the size of Syria. It is surrounded by the states of Baja California and the Sea of Cortez to the west, Chihuahua to the east, Sinaloa to the south, and Arizona to the north.The capital is...
). Both
Washingtonia species are commonly cultivated across the
United StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
, the
Middle EastThe Middle East is a region that spans southwestern Asia, southeastern Europe, and northeastern Africa. It has no clear boundaries, often used as a synonym to Near East, in opposition to Far East...
, and southern
EuropeEurope is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural River, the Caspian Sea, the Caucasus Mountains , and the Black Sea to the southeast...
e.g.
CroatiaCroatia , officially the Republic of Croatia , is a country in southeast Europe, at the crossroads of the Pannonian Plain, the Balkans, and the Mediterranean Sea. Its capital is Zagreb...
, where they have greatly hybridized.
They are fan palms (Corypheae tribe), with the
leavesIn botany, a leaf is an above-ground plant organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin. There is continued debate about whether the flatness of leaves evolved to expose the chloroplasts to more light or to increase the absorption of carbon dioxide. In...
with a bare petiole terminating in a rounded fan of numerous leaflets.
Washingtonia is a
genusIn biology, a genus is a taxonomic unit used in the classification of living and fossil organisms. The term comes from Latin genus "descent, family, type, gender" , cognate with – genos, "race, stock, kin" ..In addition, genus is a taxonomic rank in the hierarchy In biology, a genus (plural:...
of
palmsArecaceae or Palmae , the palm family, is a family of flowering plants, the only family in the monocot order Arecales...
, native to the southwestern
United StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
(in southern
CaliforniaCalifornia is the most populous state in the United States, and the third largest by area. California is the second most populous sub-national entity in the Americas, behind only São Paulo, Brazil...
, southwest
ArizonaThe State of Arizona is a state located in the southwestern region of the United States. The capital and largest city is Phoenix. The second largest city is Tucson, followed in size by the four Phoenix metropolitan area cities of Mesa, Glendale, Chandler, and Scottsdale.Arizona was the 48th and...
) and northwest
MexicoThe United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...
(in northern
Baja CaliforniaBaja California is both the northernmost and westernmost state of Mexico. Before becoming a state in 1953, the area was known as the North Territory of Baja California. It has an area of , or 3.57% of the land mass of Mexico and comprises the northern half of the Baja California peninsula, north...
and
SonoraSonora is a state in northwestern Mexico with an area of 182,052 square kilometers, making it around the size of Syria. It is surrounded by the states of Baja California and the Sea of Cortez to the west, Chihuahua to the east, Sinaloa to the south, and Arizona to the north.The capital is...
). Both
Washingtonia species are commonly cultivated across the
United StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
, the
Middle EastThe Middle East is a region that spans southwestern Asia, southeastern Europe, and northeastern Africa. It has no clear boundaries, often used as a synonym to Near East, in opposition to Far East...
, and southern
EuropeEurope is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural River, the Caspian Sea, the Caucasus Mountains , and the Black Sea to the southeast...
e.g.
CroatiaCroatia , officially the Republic of Croatia , is a country in southeast Europe, at the crossroads of the Pannonian Plain, the Balkans, and the Mediterranean Sea. Its capital is Zagreb...
, where they have greatly hybridized.
They are fan palms (Corypheae tribe), with the
leavesIn botany, a leaf is an above-ground plant organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin. There is continued debate about whether the flatness of leaves evolved to expose the chloroplasts to more light or to increase the absorption of carbon dioxide. In...
with a bare petiole terminating in a rounded fan of numerous leaflets. The
flowerA flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to mediate the union of male sperm with female ovum in order to produce seeds...
s are in a dense inflorescence, with the
fruitThe term fruit has different meanings dependent on context, and the term is not synonymous in food preparation and biology. Fruits are the means by which flowering plants disseminate seeds, and the presence of seeds indicates that a structure is most likely a fruit, though not all seeds come from...
s maturing into a small blackish-brown
drupeIn botany, a drupe is a fruit in which an outer fleshy part surrounds a shell of hardened endocarp with a seed inside. These fruits develop from a single carpel, and mostly from flowers with superior ovaries...
6-10 mm diameter with a thin layer of sweet flesh over the single
seedA seed , referred to as a kernel in some plants, is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant...
.
There are two species:
- Washingtonia filifera
Washingtonia filifera , common names Desert Fan Palm, American Cotton palm, Arizona Fan Palm, or California Fan Palm) is a palm native to the desert oases of Central, southern and southwestern Arizona, southern Nevada, extreme northwest Mexico and the inland deserts of Southern California.This...
(Lindl. ex André) H.Wendl. California Washingtonia, Northern Washingtonia, California fan palm, or Desert fan palm. Tree to 23 m tall; leaves large, with petiole up to 2 m long, and leaflets up to 2 m long. Inflorescence to 5 m long; flowers white; fruit oval. Southwestern USA, just into extreme northwest Mexico.
- Washingtonia robusta
Washingtonia robusta is a palm native to northwestern Mexico. It grows to 25 m tall, rarely up to 30 m. The leaves have a petiole up to 1 m long, and a palmate fan of leaflets up to 1 m long. The inflorescence is up to 3 m long, with numerous small pale orange-pink flowers...
H.Wendl. Mexican Washingtonia or Southern Washingtonia. Tree to 25 m tall; leaves smaller, with petiole up to 1 m long, and leaflets up to 1 m long. Inflorescence to 3 m long; flowers pale orange-pink; fruit spherical. Northwest Mexico.
The fruit is edible, and was used by
Native AmericanNative Americans in the United States is the phrase that describes indigenous peoples from North America now encompassed by the continental United States, including parts of Alaska and the island state of Hawaii. They comprise a large number of distinct tribes, states, and ethnic groups, many of...
people as a minor food source. They are also eaten by
birdBirds are winged, bipedal, endothermic , vertebrate animals that lay eggs. There are around 10,000 living species, making them the most numerous tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Birds range in size from the Bee Hummingbird to the ...
s, which disperse the seeds in their droppings after digesting the fruit pulp.
Washingtonia species are also used as food plants by the
larvaA larva is a young form of animal with indirect development, going through or undergoing metamorphosis ....
e of some
LepidopteraLepidoptera is an order of insects that includes moths and butterflies. It is one of the most speciose orders in the class Insecta, encompassing moths and the three superfamilies of butterflies, skipper butterflies, and moth-butterflies...
species including
Paysandisia archonPaysandisia archon is a moth of the family Castniidae. It is native to Uruguay and central Argentina and has been accidentally introduced to Europe, where it is spreading rapidly. It is considered the only member of the genus Paysandisia....
.
Both species are cultivated as ornamental trees, widely planted in California in particular, but also in
FloridaFlorida is a state located in the southeastern region of the United States, bordering Alabama to the northwest and Georgia to the north. It was the 27th state admitted to the United States...
, extreme southwest
UtahUtah is a western state of the United States. It was the 45th state admitted to the Union, on January 4, 1896. Approximately 80 percent of Utah's 2,736,424 people live along the Wasatch Front, centering around Salt Lake City. In contrast, vast expanses of the state are nearly uninhabited, making...
, southern
ArizonaThe State of Arizona is a state located in the southwestern region of the United States. The capital and largest city is Phoenix. The second largest city is Tucson, followed in size by the four Phoenix metropolitan area cities of Mesa, Glendale, Chandler, and Scottsdale.Arizona was the 48th and...
, southern
New MexicoNew Mexico is a state located in the southwestern region of the United States. Inhabited by Native American populations for many centuries, it has also been part of the Imperial Spanish viceroyalty of New Spain, part of Mexico, and a U.S. territory. Among U.S...
, western and southern
TexasTexas is the second-largest U.S. state in both area and population, and the largest state in the contiguous United States.The name had wide usage among native Americans, meaning "friends" or "allies"...
, the Mediterranean region in southern
EuropeEurope is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural River, the Caspian Sea, the Caucasus Mountains , and the Black Sea to the southeast...
like
CroatiaCroatia , officially the Republic of Croatia , is a country in southeast Europe, at the crossroads of the Pannonian Plain, the Balkans, and the Mediterranean Sea. Its capital is Zagreb...
, parts of
AustraliaAustralia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the continental mainland , the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans...
and the leeward sides of the
HawaiiHawaii is the newest of the 50 U.S. states, and is the only state made up entirely of islands. It is located on an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of Australia. The state was admitted to the Union on August...
an Islands. The species is also attempted, rather unsuccessfully, in cooler climates such as western
OregonOregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...
and
WashingtonWashington is a state in the Pacific Northwest region of the United States. Washington was carved out of the western part of Washington Territory which had been ceded by Britain in 1846 by the Oregon Treaty as settlement of the Oregon Boundary Dispute. It was admitted to the Union as the...
, the
Columbia BasinThe Columbia Basin, the drainage basin of the Columbia River, occupies a large area–about 673,396 square kilometres —of the Pacific Northwest region of North America...
, and the milder parts of the southern
British IslesThe British Isles are a group of islands off the northwest coast of continental Europe that include Great Britain, Ireland and numerous smaller islands. There are two sovereign states located on the islands: the United Kingdom of Great Britain and Northern Ireland, and Ireland...
.
W. filifera is actually very
hardyHardy palms are any of the species of palm that are able to withstand colder temperatures and thrive in places not typically considered in the natural range for palms. Several are native to higher elevations in Asia and can tolerate hard freezes with little or no damage...
in a dry climate and able to survive brief temperatures in the vicinity of -15 °C (5 °F) provided the air and soil are not too wet, and the afternoon temperatures are not too cold. Intolerance of wet, prolonged cold is the main reason the
filifera species cannot grow properly in temperate marine climates.
W. robusta is less sensitive to moisture than
filifera, but far more easily damaged by cold.
The genus is named after
George WashingtonGeorge Washington was the commander of the Continental Army in the American Revolutionary War and served as the first President of the United States of America...
.
External links