Trees Planet: Sorbus sargentiana

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

Classification

Kingdom	Plantae – Plants
Subkingdom	Tracheobionta – Vascular plants
Superdivision	Spermatophyta – 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.