Vasilis Teodoridis:
Betulaceae | Betula
4. Betula luminifera H. Winkler in Engler; Pflanzenr. IV. 61 (Heft 19): 91. 1904.
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Betula acuminata Wallich var. pyrifolia Franchet; B. alnoides Buchanan-Hamilton var. pyrifolia (Franchet) Burkill; B. baeumkeri H. Winkler; B. cylindrostachya Lindley var. resinosa Diels; B. hupehensis C. K. Schneider; B. luminifera var. baeumderi (H. Winkler) P. C. Kuo.
Trees to 25 m tall; bark dark brown; smooth. Branchlets yellow-brown; densely yellow pubescent; sparsely resinous glandular; glabrescent. Petiole 1-2 cm; densely villous and resinous punctate; leaf blade oblong; broadly oblong; or oblong-lanceolate; rarely elliptic or ovate; 4.5-10 x 2.5-6 cm; abaxially densely resinous punctate; bearded in axils of lateral veins; adaxially densely pubescent when young; base rounded; subcordate; or broadly cuneate; margin irregularly and doubly setiform serrate; apex mucronate or caudate; lateral veins 12-14 on each side of midvein. Female inflorescence 1(-2); pendulous; narrowly cylindric; 3-9 cm x 6-10 mm; peduncle 1-2 mm; densely pubescent and resinous punctate; bracts 2-3 mm; sparsely pubescent and ciliolate; spongy at base; 3-lobed; middle lobe oblong or lanceolate; lateral lobes ± reduced; 1/4-1/3 as long as middle lobe. Nutlet obovate; ca. 2 mm; sparsely pubescent; with membranous wings 1-2 x as wide as nutlet. Fl. May-Jun; fr. Jun-Aug.
* Broad-leaved forests on sunny mountain slopes; 200-2900 m. Anhui; Fujian; Gansu; N Guangdong; Guangxi; Guizhou; Henan; Hubei; Hunan; Jiangsu; Jiangxi; Shaanxi; Sichuan; Yunnan; Zhejiang
Vasilis Teodoridis:
Betulaceae | Betula
4. Betula luminifera H. Winkler in Engler; Pflanzenr. IV. 61 (Heft 19): 91. 1904.
??? liang ye hua
Betula acuminata Wallich var. pyrifolia Franchet; B. alnoides Buchanan-Hamilton var. pyrifolia (Franchet) Burkill; B. baeumkeri H. Winkler; B. cylindrostachya Lindley var. resinosa Diels; B. hupehensis C. K. Schneider; B. luminifera var. baeumderi (H. Winkler) P. C. Kuo.
Trees to 25 m tall; bark dark brown; smooth. Branchlets yellow-brown; densely yellow pubescent; sparsely resinous glandular; glabrescent. Petiole 1-2 cm; densely villous and resinous punctate; leaf blade oblong; broadly oblong; or oblong-lanceolate; rarely elliptic or ovate; 4.5-10 x 2.5-6 cm; abaxially densely resinous punctate; bearded in axils of lateral veins; adaxially densely pubescent when young; base rounded; subcordate; or broadly cuneate; margin irregularly and doubly setiform serrate; apex mucronate or caudate; lateral veins 12-14 on each side of midvein. Female inflorescence 1(-2); pendulous; narrowly cylindric; 3-9 cm x 6-10 mm; peduncle 1-2 mm; densely pubescent and resinous punctate; bracts 2-3 mm; sparsely pubescent and ciliolate; spongy at base; 3-lobed; middle lobe oblong or lanceolate; lateral lobes ± reduced; 1/4-1/3 as long as middle lobe. Nutlet obovate; ca. 2 mm; sparsely pubescent; with membranous wings 1-2 x as wide as nutlet. Fl. May-Jun; fr. Jun-Aug.
* Broad-leaved forests on sunny mountain slopes; 200-2900 m. Anhui; Fujian; Gansu; N Guangdong; Guangxi; Guizhou; Henan; Hubei; Hunan; Jiangsu; Jiangxi; Shaanxi; Sichuan; Yunnan; Zhejiang