Biology:Aria rupicola
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Short description: Species of shrub
| Aria rupicola | |
|---|---|
| |
| Rock whitebeam at the Trondheimsfjord, Norway | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Rosaceae |
| Genus: | Aria |
| Species: | A. rupicola
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| Binomial name | |
| Aria rupicola (Syme) Mezhenskyj
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| Synonyms | |
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List
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Aria rupicola, commonly known as rock whitebeam,[1] is a rare species of shrub or small tree best known from the British Isles but also reported from Norway, Sweden and Russia.[2]
Reaching heights of 10 m,[3] it grows in rocky woodland, scrub and cliffs, usually on limestone.[3]
The species reproduces apomictically (asexually via cloned seeds) and was presumably created by autopolyploidysation of the common whitebeam proper (Sorbus aria s.str.). It contains a tetraploidal set of chromosomes (2n=4x=68).
Stace gives Aria rupicola the following characteristics:[3]
- Leaves unlobed or lobed ≤1/20 of the way to the midrib.
- Leaves with a single style of teeth or, weakly, two styles of teeth.
- Leaves with 6 to 9 (rarely 4 to 10) pairs of lateral veins.
- Leaves mostly 1.6 to 2.4 times longer than wide.
- Leaves mostly widest in that half of the leaf furthest from the stalk.
- Leaves usually obtuse (rarely acute) at apex.
- Leaves have dense white hairs on lower surface.
- Fruits 10-15mm across, warty.
A young specimen
Back of a leaf
Upper surface of a leaf
Upper surface of a leaf
Twig and part of a leaf
References
- ↑ (xls) BSBI List 2007, Botanical Society of Britain and Ireland, https://bsbi.org/download/3542/, retrieved 2014-10-17
- ↑ "Ecological flora of the British Isles: Sorbus rupicola". http://www.ecoflora.co.uk/search_species2.php?plant_no=800280070. Retrieved 2010-07-17.
- ↑ 3.0 3.1 3.2 New Flora of the British Isles; Clive Stace; Third edition; 2011 printing
Further reading
- Ennos, R. A.; G. C. French; P. M. Hollingsworth (2005). "Conserving taxonomic complexity". Trends in Ecology and Evolution 20 (4): 164–168. doi:10.1016/j.tree.2005.01.012. PMID 16701363.
- Robertson, A.; A. C. Newton; R. A. Ennos (2004). "Multiple hybrid origins, genetic diversity and population genetic structure of two endemic Sorbus taxa on the Isle of Arran, Scotland". Molecular Ecology 13 (1): 123–134. doi:10.1046/j.1365-294X.2003.02025.x. PMID 14653794.
External links
- Distribution map of S. rupicola. Naturhistoriska riksmuseet.
Wikidata ☰ {{{from}}} entry
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