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Sorbus

Cladus: Eukaryota
Regnum: Plantae
Divisio: Magnoliophyta
Classis: Magnoliopsida
Ordo: Rosales
Familia: Rosaceae
Subfamilia: Maloideae
Genus: Sorbus
Subgenera: S. subg. Aria - S. subg. Chamaemespilus - S. subg. Cormus - S. subg. Micromeles - S. subg. Sorbus - S. subg. Torminaria - Unassigned Sorbus

Name

Sorbus L.

Vernacular names
Internationalization
Dansk: Røn
Deutsch: Mehlbeeren
English: Rowan, Service-tree, Whitebeam
Español: Serbal
Eesti: Pihlakas
Français: Alisier, Sorbier
Hrvatski: Oskoruša
Italiano: Sorbo
Nederlands: Lijsterbes, Meelbes
‪Norsk (nynorsk)‬: Asal, Rogn
Português: Sorveira, Tramazeira
Русский: Рябина
Suomi: Pihlajat
Svenska: Oxel, Rönn
Türkçe: Üvez
Українська: Горобина

Sorbus is a genus of about 100–200 species of trees and shrubs in the subfamily Maloideae of the Rose family Rosaceae. Species of Sorbus (s.l.) are commonly known as whitebeam, rowan, service tree, and mountain ash. The exact number of species is disputed depending on the circumscription of the genus, and also due to the number of apomictic microspecies, which some treat as distinct species but others group in a smaller number of variable species. Recent treatments [2][3][1][4] treat Sorbus in a narrower sense to include only the pinnate leaved species of subgenus Sorbus, raising several of the other subgenera to generic rank.

Sorbus is unrelated to the true ash trees which belong to the genus Fraxinus, although the leaves are superficially similar.

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 rowan (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 aucuparia (European rowan). Distribution: cool-temperate Northern Hemisphere. (Genus Sorbus s.s.)

* Sorbus subgenus Aria (genus Aria), the whitebeam, with simple leaves usually strongly white-hairy below (hence the name, from German Weissbaum, 'white tree'); fruit carpels not fused; type species Sorbus aria (common whitebeam). Distribution: temperate Europe & Asia.

* Sorbus subgenus Micromeles (genus Aria), an indistinct group of a few east Asian species (e.g. Sorbus alnifolia, Korean whitebeam) with narrow leaves; doubtfully distinct from and often included in subgenus Aria. Distribution: temperate northeast Asia.

* 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 Africa, warm-temperate Europe, West Asia.

* Sorbus subgenus Torminaria (genus Torminalis), with rather maple-like lobed leaves with pointed lobes; fruit carpels not fused; just one species, Sorbus torminalis (Wild Service Tree). Distribution: temperate Europe, south to the mountains of North Africa and east to the Caucasus 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 Europe.

* Hybrids are common in the genus, including many between the subgenera; very often these hybrids are apomictic (self-fertile without pollination), so able to reproduce clonally from seed without any variation. This has led to a very large number of microspecies, particularly in western Europe (including Britain) and parts of China.

Sorbus species are used as food plants by the larvae of some moth species—see list of Lepidoptera that feed on Sorbus.

Wine

Sorbus[5] is also a fortified Finnish fruit wine flavoured with rowan berries. Sorbus domestica is used to flavour some apple wines, see apfelwein.

References

1. ^ a b Potter, D., T. Eriksson, R. C. Evans, S.-H. Oh, J. E. E. Smedmark, D.R. Morgan, M. S. Kerr, and C. S. Campbell. (2007). Phylogeny and classification of Rosaceae. Plant Systematics and Evolution. 266(1–2): 5–43.
2. ^ Robertson, K. R., J. B. Phipps, J. R. Rohrer, and P. G. Smith. 1991. A Synopsis of Genera in Maloideae (Rosaceae). Systematic Botany 16: 376–394.
3. ^ McAllister, H. 2005. The Genus Sorbus: Mountain Ash and Other Rowans. Richmond, Surrey, UK: Royal Botanic Gardens, Kew.
4. ^ Campbell C. S., R. C. Evans, D. R. Morgan, T. A. Dickinson, and M. P. Arsenault. 2007. Phylogeny of subtribe Pyrinae (formerly the Maloideae, Rosaceae): Limited resolution of a complex evolutionary history. Pl. Syst. Evol. 266: 119–145.
5. ^ http://www.alko.fi/tuotteet/en/002517


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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Source: Wikipedia, Wikispecies: All text is available under the terms of the GNU Free Documentation License