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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]
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.
Sorbus americana is cultivated as an ornamental tree, for use in gardens and parks. It prefers a rich moist soil and the borders of swamps, but will flourish on rocky hillsides. A cultivar is the red cascade mountain-ash, or Sorbus americana 'Dwarfcrown'. It is planted in gardens, and as a street tree. [11]
As treated in its broad sense, the genus is divided into two main and three or four small subgenera: Sorbus (Sorbus). now genus Sorbus s.s., are commonly known as the rowan (primarily in the UK) or mountain-ash (in Ireland, North America and the UK), with compound leaves usually hairless or thinly hairy below; fruit carpels not fused; the type is Sorbus aucuparia (European rowan).
Sorbus vilmorinii, the Vilmorin's rowan [1] or Vilmorin's mountain ash, is a species of flowering plant in the family Rosaceae, native to Sichuan, Tibet and Yunnan in China.. It is a deciduous shrub or small tree, 4–6 metres (13–20 ft) tall, with ferny leaves, each having multiple leaflets that turn purple in autumn (fall).
The leaves consist of 11–17 leaflets, each 4–7 cm (2–3 in) long and 1–2.5 cm broad, with an acuminate apex and serrated margins; they change to a deep purple or red in autumn. The flowers are 6–10 mm in diameter, with five white petals and 20 yellowish-white stamens; they are produced in corymbs 9–15 cm (4–6 in) in diameter in ...
Sorbus hupehensis is a small deciduous tree growing to 5–10 m tall, with grey-brown to purplish-brown bark. The branches and shoots are slender. The leaves are green above, paler beneath, 10–15 cm long, pinnate with 7-17 narrow oval leaflets 3–5 cm long and 1–1.8 cm broad, with an acute apex, and serrated margins. They change to orange ...
Sorbus sargentiana, commonly known as Sargent's rowan [1] is a species of flowering plant in the family Rosaceae. It is native to southwestern Sichuan and northern Yunnan in China, where it grows at altitudes of 2,000–3,200 m (6,560–10,500 ft).