Friday, March 6, 2015

Sorbus sargentiana - Sargent's Rowan

General Information
Common Name Sargent's Rowan
Scientific Name Sorbus sargentiana
Sun Tolerance Full Sun
Height 6-16 m (20-52 ft)
Spread 5-10 m (17-33 ft)
Growth Rate Fast
Bloom Time Spring
Color Green,
Flower Color White
Type Tree
Native Asia, Europe, USA
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
SuperdivisionSpermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Rosidae
Order Rosales
Family Rosaceae – Rose family
Genus Sorbus L. – Rowan
Species S. sargentiana
Sorbus sargentiana - Sargent's Rowan
Sorbus sargentiana commonly known as Sargent's Rowan. It is native to southwestern Sichuan and northern Yunnan in China.
It is a small to medium-sized deciduous tree. It is growing to 6–16 m (20–52 ft) in height. The trunk of S. sargentiana grows up to 50 cm (20 in) in diameter, and a rounded crown. The bark is dark grey, and the shoots very stout, with large (1–2 cm), dark red, sticky resinous winter buds. The leaves are the largest of any rowan, dark green with impressed veining above, glaucous beneath, 20–35 cm (8–14 in) long and 15–20 cm (6–8 in) broad, with persistent 1 cm broad stipules. The pinnate leaves conisist of 9–11 oblong-lanceolate leaflets 5–14 cm (2–6 in) cm long and 3.5–5 cm (1–2 in) broad, with an acute apex, serrated margins. The basal leaflets are slightly smaller than the apical leaflets. They change to a rich orange-pink to purple or dark red in mid-autumn. It blooms in late spring to early summer. The flowers are 5–7 mm in diameter, with five white petals and 20 yellowish-white stamens; they are produced 200–500 together in very large corymbs 12–25 cm (5–10 in) in diameter. The fruit is a pome 5–8 mm diameter, bright orange-red to red, maturing in early autumn; it is juicy, and readily eaten as soon as it is ripe by thrushes, which disperse the seeds. 
It is grown as an ornamental tree for its bold foliage, huge clusters of fruit, and bright autumn color. It is also cultivate in USA and Europe as an ornamental tree, in the park and garden.

Sorbus sargentiana - Sargent's Rowan

Sorbus sargentiana - Sargent's Rowan Leaves

Sorbus sargentiana - Sargent's Rowan Leaves in Autumn

Sorbus sargentiana Leaves in Autumn

Sorbus sargentiana - Sargent's Rowan Buds

Sorbus sargentiana - Sargent's Rowan Flowers

Flowers of Sorbus sargentiana - Sargent's Rowan

Sorbus sargentiana - Sargent's Rowan Fruits

Sorbus sargentiana - Sargent's Rowan in Autumn

Sorbus sargentiana - Sargent's Rowan Autumn Color

Sorbus sargentiana - Sargent's Rowan Autumn Color

Sorbus sargentiana - Sargent's Rowan Young Plant

Sorbus sargentiana - Sargent's Rowan

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