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Sorbus

 

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Sorbus


 
 

The genus Sorbus is a genusGenus

In the binomial nomenclature used worldwide, the name of an organism is composed of two parts: its genus name and a species...
 of about 100-200 species of treeTree

A tree is a large, perennial, woody plant....
s and shrubShrub

A shrub or bush is a horticultural rather than strictly botanical category of woody plant, distinguished from a tree b...
s in the subfamily MaloideaeMaloideae

The Maloideae is a subfamily of the rose family Rosaceae characterised in its traditional description by the possession of ...
 of the Rose familyFamily (biology)

In biological classification, family is 1) a rank or 2) a taxon in that rank....
 RosaceaeRosaceae

The Rosaceae or rose family is a large family of plants, with about 3,000-4,000 species in 100-120 genera....
. The exact number of species is disputed considerably between different authorities, due to the number of apomicticApomixis

In botany, apomixis is asexual reproduction, without fertilization and without meiosis....
 microspeciesApomixis

In botany, apomixis is asexual reproduction, without fertilization and without meiosis....
, treated by some as distinct species, by others grouped in a much smaller number of variable species, and also depending on the circumscription of the genus. Recent treatments (Robertson et al. 1991, McAllister 2005) treat Sorbus in a narrower sense to include only the pinnate-leaved species of subgenusSubgenus

In biology, a subgenus is a taxon at a rank directly below genus....
 Sorbus, raising several of the other subgenera to generic rank. Species of Sorbus (s.l.) are commonly known as whitebeamWhitebeam

The whitebeams are members of the Rosaceae family, in genus Sorbus subgenus Aria....
, rowanRowan

----The rowans are plants of the Family Rosaceae, in the Genus Sorbus, Subgenus Sorbus....
, service treeService Tree

The Service Tree is sometimes known as the True Service Tree to distinguish it from the Wild Service Tree....
, and mountain ashSorbus aucuparia

Sorbus aucuparia , is a species of the genus Sorbus , native to most of Europe except for the far south, and norther...
.

As treated in its broad sense, the genus is divided into two main and three or four small subgenera (with more recent generic assignments in parentheses):

  • Sorbus subgenus Sorbus (genus Sorbus s.s.), commonly known as the rowanRowan

    ----The rowans are plants of the Family Rosaceae, in the Genus Sorbus, Subgenus Sorbus....
    (primarily in the UK) or mountain ash (in both North America and the UK), with compound leaves usually hairless or thinly hairy below; fruit carpels not fused; type species Sorbus aucupariaSorbus aucuparia

    Sorbus aucuparia , is a species of the genus Sorbus , native to most of Europe except for the far south, and norther...
    (European rowan). Distribution: cool-temperate Northern HemisphereNorthern Hemisphere

    The Northern Hemisphere is the half of a planet's surface that is north of the equator ....
    . (Genus Sorbus s.s.)


  • Sorbus subgenus Aria (genus Aria), the whitebeamWhitebeam

    The whitebeams are members of the Rosaceae family, in genus Sorbus subgenus Aria....
    , with simple leaves usually strongly white-hairy below (hence the name, from German Weissbaum, 'white tree'); fruit carpels not fused; type species Sorbus ariaSorbus aria

    Sorbus aria, the Whitebeam or Common Whitebeam is a deciduous tree, compact and domed, with few upswept bran...
    (common whitebeam). Distribution: temperate EuropeEurope

    Europe is one of the seven traditional continents of the Earth....
     & AsiaAsia

    Asia is the largest and most populous continent or region, depending on the definition....
    .


  • Sorbus subgenus Micromeles (genus Aria), an indistinct group of a few east Asian species (e.g. Sorbus alnifoliaSorbus alnifolia

    Sorbus alnifolia is a species of whitebeam native to eastern Asia in China, Korea and Japan....
    , Korean whitebeam) with narrow leaves; doubtfully distinct from and often included in subgenus Aria. Distribution: temperate northeast AsiaAsia

    Asia is the largest and most populous continent or region, depending on the definition....
    .


  • Sorbus subgenus Cormus (genus Cormus), with compound leaves similar to subgenus Sorbus, but with distinct fused carpels in the fruit; just one species, Sorbus domestica (True Service Tree). Distribution: North AfricaNorth Africa

    North Africa or Northern Africa is the northernmost region of the African continent....
    , warm-temperate EuropeEurope

    Europe is one of the seven traditional continents of the Earth....
    , West Asia.


  • Sorbus subgenus Torminaria (genus Torminaria), with rather maple-like lobed leaves with pointed lobes; fruit carpels not fused; just one species, Sorbus torminalis (Wild Service Tree). Distribution: temperate EuropeEurope

    Europe is one of the seven traditional continents of the Earth....
    , south to the mountains of North AfricaNorth Africa

    North Africa or Northern Africa is the northernmost region of the African continent....
     and east to the CaucasusCaucasus

    The Caucasus or Caucasia is a region in Eurasia bordered on the south by Turkey and Iran in Asia, on the west by the B...
     ranges.


  • Sorbus subgenus Chamaemespilus (genus Chamaemespilus), a single shrubby species Sorbus chamaemespilus (false medlar) with simple, glabrous leaves and pink flowers with erect sepals and petals. Distribution: mountains of southern EuropeEurope

    Europe is one of the seven traditional continents of the Earth....
    .


  • Hybrids are common in the genus, including many between the subgenera; very often these hybrids are apomicticApomixis

    In botany, apomixis is asexual reproduction, without fertilization and without meiosis....
     (self-fertile without pollination), so able to reproduce clonally from seed without any variation. This has led to a very large number of microspeciesApomixis

    In botany, apomixis is asexual reproduction, without fertilization and without meiosis....
    , particularly in western Europe (including Britain) and parts of China.


Sorbus species are used as food plants by the larvaLarva

A larva is a juvenile form of animal with indirect development, undergoing metamorphosis ....
e of some LepidopteraLepidoptera

The order Lepidoptera is the second largest order in the class insecta and includes the butterflies, skippers, and moths....
 species - see list of Lepidoptera that feed on Sorbus.

Wine

Sorbus is also a strong Finnish fruit wine spiced with Sorbus berries.

Further reading

  • Price, D.T. 2007. One-way introgressive hybridisation between Sorbus aria and S. torminalis (Rosaceae) in southern Britain. Watsonia. 26: 419 - 431.


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