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Sorbus aucuparia, commonly called rowan (/ ˈ r oʊ ən /, [3] also UK: / ˈ r aʊ ən /) and mountain-ash, is a species of deciduous tree or shrub in the rose family. The tree has a slender trunk with smooth bark, a loose and roundish crown, and its leaves are pinnate in pairs of leaflets on a central vein with a terminal leaflet.
Rowans are unrelated to the true ash trees of the genus Fraxinus, family Oleaceae. Though their leaves are superficially similar, those of Sorbus are alternate, while those of Fraxinus are opposite. [10]: 388 Rowan leaves are arranged alternately, and are pinnate, with (7–)11–35 leaflets. A terminal leaflet is always present.
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.Currently, species commonly known as whitebeam, chequer tree and service tree are classified in other genera (see below), so that genus Sorbus includes only the pinnate leaved species of former subgenus Sorbus.
Green’s mountain ash (S. scopulina) is native to the mountains from Alaska to California, and east to the Rocky Mountains and Northern Great Plains. It grows as a multi-stemmed shrub that is ...
The tree species Sorbus americana is commonly known as the American mountain-ash. [4] It is a deciduous perennial tree, native to eastern North America. [5]The American mountain-ash and related species (most often the European mountain-ash, Sorbus aucuparia) are also referred to as rowan trees.
Eucalyptus regnans, known variously as mountain ash (in Victoria), giant ash or swamp gum (in Tasmania), or stringy gum, [3] is a species of very tall forest tree that is native to the Australia states of Tasmania and Victoria. It is a straight-trunked tree with smooth grey bark, but with a stocking of rough brown bark at the base, glossy green ...
The mountain ash has a leaf made up of a number of leaflets, whilst the whitebeam leaf is entire and doesn't even have lobes. The result of crossing the two is that the hybrids begin to merge or mix characteristics, so that S. arranensis has lobes but no leaflets, while S. pseudofennica , having an extra cross with the "leafleted" mountain ash ...
Sorbus sitchensis, commonly known as western mountain ash [1] and Sitka mountain-ash, is a small species of shrub of northwestern North America. Description [ edit ]