Search results
Results from the WOW.Com Content Network
Sorbus is a genus of over 100 species of trees and shrubs in the rose family, Rosaceae.Species of Sorbus are commonly known as rowan or mountain-ash.The genus used to include species commonly known as whitebeam, chequer tree and service tree that are now classified in other genera (see below).
Griffitharia thibetica (康藏花楸), [1] the Tibetan whitebeam, is a species of flowering plant in the family Rosaceae, native to south western China and the Himalayas. Growing to 20 m (66 ft) tall by 15 m (49 ft) broad, it is a substantial deciduous tree.
The trees developed in a highly complex fashion, which involved the common whitebeam (Sorbus aria) giving rise to the tetraploid rock whitebeam (Sorbus rupicola) which is still found on Holy Isle. This species is able to survive at higher altitudes and therefore occupies a less competitive niche with fewer tree species able to tolerate the ...
The following species are recognised in the genus Sorbus, many of which are called rowans or mountain-ashes: [1] This list follows a narrow definition of genus Sorbus; species that have been moved to the genera Aria, Torminalis, Cormus, Chamaemespilus, Hedlundia, Scandosorbus, Karpatiosorbus, Mayovskya and Normeyera are not listed.
The rowans (/ ˈ r aʊ ə n z / ROW-ənz or / ˈ r oʊ ə n z / ROH-ənz) [1] or mountain-ashes are shrubs or trees in the genus Sorbus of the rose family, Rosaceae.They are native throughout the cool temperate regions of the Northern Hemisphere, with the highest species diversity in the Himalaya, southern Tibet and parts of western China, where numerous apomictic microspecies occur. [2]
In many species, the surface of the leaves is an unremarkable mid-green, but the underside is pale to almost white (hence the name) with pale grey or white hairs, transforming the appearance of the tree in strong winds, as noted by the poet Meredith: "flashing as in gusts the sudden-lighted whitebeam". [2]
Sorbus waltersii P.D.Sell Hedlundia anglica , the English whitebeam , [ 2 ] is a species of whitebeam tree in the family Rosaceae . [ 3 ] It is endemic to Ireland and the United Kingdom, with an entire British population estimated at 600 [ 4 ] individuals.
The crown is columnar or conic in young trees, becoming rounded with age, with branches angled upwards. The leaves are green above, and densely hairy with white hairs beneath. 7–12 cm (2.8–4.7 in) long and 5–8 cm (2.0–3.1 in) broad, the leaves are lobed, with six to nine oval lobes on each side of the leaf.