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Dinghushan | Family List | Eucommiaceae | Eucommia

Eucommia ulmoides Oliv.

杜仲

Description from Flora of China

Trees to 20 m tall. Trunk to 50 cm d.b.h.; bark gray-brown, scabrous. Young branches yellow-brown pubescent at first, soon glabrate, old ones conspicuously lenticellate. Buds shiny red-brown; scales 6–8, margin puberulous. Petiole 1–2.5 cm, sparsely villous; leaf blade pale green adaxially when old, 5–15 × 2.5–7 cm, brown pubescent at first, later pubescent only along veins, lateral veins 6–9-paired, together with reticulate veins slightly prominent abaxially, concave adaxially. Male flowers: stamens ca. 1 cm, glabrous, filaments ca. 1 mm. Female flower: ovary ca. 1 cm, glabrous. Samara 2.5–3.5 × 1–1.3 cm; stipe 2–5 mm, articulate at 1–3 mm pedicel. Seed 1.3–1.5 cm × ca. 3 mm. Fl. Mar–May, fr. Jun–Nov.

Eucommia ulmoides is a rare species in the wild in China, although it is much cultivated. The timber is used for furniture and fuel; the bark, which contains aucubin, is used medicinally as an invigorator, a tonic for arthritis, and for reducing blood pressure; and the solidified latex is used for lining pipes, insulating electric cables, and for filling teeth.

Mixed forests, sparse forests, thickets, lower mountains, ridges, valleys, dry ravines, fields, also widely cultivated and locally becoming naturalized; 100--2000 m. Gansu, Guizhou, Henan, Hubei, Hunan, Shaanxi, Sichuan, Yunnan, Zhejiang; cultivated in Anhui and Beijing.

生活型: 乔木

栽培植物: 栽培

特征: 落叶乔木;

生境: 引种栽培

用途: 树皮入药,补肝肾、强筋骨,治高血压、腰膝痛、跌打、安胎等;树皮、叶、种子含硬性橡胶,为工业重要原料;木材供建筑、车船、家具用材

门中名: 种子植物门

亚门中名: 被子植物亚门

纲中名: 双子叶植物纲


 

Related Objects  

Flora of China  
  • Flora of China Illustrations vol. 9, fig. 25, 1-6
  • Illustration

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