Overview

Distribution

Localities documented in Tropicos sources

Betula fargesii Franch.:
China (Asia)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Localities documented in Tropicos sources

Betula chinensis Maxim.:
South Korea (Asia)
China (Asia)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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W Hubei, E Sichuan (Chengkou Xian)
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E Gansu, Hebei, Henan, Liaoning, Nei Mongol, Shaanxi, Shandong, Shanxi [Korea]
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Physical Description

Morphology

Description

Trees to 15 m tall; bark dark gray. Branchlets brown, sparsely pubescent. Petiole 4-6 mm, pubescent; leaf blade ovate or ovate-lanceolate, 4.5-6 × 2.5-4.5 cm, papery, abaxially villous along veins, adaxially scattered pilose, base rounded, margin irregularly and doubly mucronate serrate, apex acute or acuminate; veins 9-11 on each side of midvein. Female inflorescence ovoid or ovoid-oblong, 1-1.5 × 0.5-1.5 cm; peduncle 1-2 mm; bracts 5-10 mm, ciliate, with 3 subequal lobes. Nutlet obovate, pubescent, with very narrow wings. Fl. May-Jun, fr. Jul-Aug.
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Description

Shrubs to 5 m tall; bark black-gray. Branchlets brown or yellow-brown, densely villous. Petiole 0.2-2 cm, densely villous; leaf blade ovate, broadly ovate, or ovate-elliptic, 1.5-6 × 1-5 cm, abaxially villous, sometimes resinous punctate, sparsely bearded in axils of lateral veins, adaxially densely villous when young, base rounded or broadly cuneate, margin irregularly and doubly dentate-serrate, apex acute or obtuse; lateral veins 8 or 9(or 10) on each side of midvein. Female inflorescence subglobose, rarely oblong, 1-2 × 0.6-1.5 cm; peduncle 1-2 mm; bracts 5-9 mm, pubescent, ciliate, 3-lobed, lobes reflexed, middle lobe lanceolate, lateral lobes spreading, ovate, 1/3-1/2 as long as middle lobe. Nutlet obovate or ovate, with very narrow wings, sometimes horn-shaped at apex. Fl. May-Jun, fr. Jul-Aug.
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Diagnostic Description

Synonym

Betula chinensis Maximowicz var. fargesii (Franchet) P. C. Li.
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Synonym

Betula ceratoptera G. H. Liu & Y. C. Ma; B. chinensis var. angusticarpa H. Winkler; B. chinensis var. nana Liou; B. exalata S. Moore; B. jiaodongensis S. B. Liang; B. liaotungensis Baranov.
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Ecology

Habitat

* Broad-leaved forests or thickets on hilltops; 1500-2600 m.
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Broad-leaved forests in mountain valleys, shaded, rocky mountain slopes; 700-3000 m.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Betula chinensis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
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Wikipedia

Betula chinensis

Betula chinensis (Chinese: 坚桦; pinyin: jian hua) is a species of birch that can be found in China and Korea on the elevation of 700–3,000 metres (2,300–9,800 ft).[1]

Description[edit]

The species is 5 metres (16 ft) tall with either yellow or yellowish-brown colour. Leaf blade is elliptic and ovate with a diameter of 1.5–6 centimetres (0.59–2.4 in) by 1–5 centimetres (0.39–2.0 in). Female species have a subglobose inflorescence which is also oblong with a diameter of 1–2 centimetres (0.39–0.79 in) by 0.6–1.5 centimetres (0.24–0.59 in). It peduncle is 1–2 millimetres (0.039–0.079 in) long while its bracts can be as long as 5–9 millimetres (0.20–0.35 in). Flowers bloom from May to June while the fruits ripe from July to August.[1]

References[edit]


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Notes

Comments

This species is one of the most valuable timber trees in N China. The wood is extremely hard and dense, close grained, very fine textured, and is used for making pestles and wagon axles.
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