《云南植物志》|| 壳斗科 Fagaceae ||栲属 Castanopsis Spach ||弯刺栲　 Castanopsis clarkei King ex Hook. f.

4. 弯刺栲　图版69，9－12
Castanopsis clarkei King ex Hook. f. (1888) (1889); A. Camus (1929); 徐、任 (1975)*.
乔木，高达20米，树皮灰黑色。小枝密被黄棕色绒毛，以后渐脱落。叶长椭圆形，长10—20厘米，宽5—8厘米，顶端短渐尖，基部圆形或宽楔形，或略偏斜，边缘具疏锯齿，背面被紧贴细柔毛，侧脉10—18对，嫩叶时二次侧脉很不明显，老叶时略明显；叶柄长1.5－2.5厘米。果序长15－25厘米，轴被毛或渐脱落。成熟总苞连刺直径4—5厘米；苞片针刺形，密生，刺长约1厘米，稍弯曲，下部近三稜形，基部易折断，总苞壁被黄棕色绒毛，总苞内有1个坚果。花期3－4月。
产西双版纳海拔560—1100米的次生林或疏林中。越南，印度亦有。

《Flora of China》|| Fagaceae || Castanopsis ||棱刺锥 Castanopsis clarkei

16. Castanopsis clarkei King ex J. D. Hooker, Fl. Brit. India. 5: 623. 1888.

棱刺锥 leng ci zhui

Trees; young shoots and rachis of inflorescences densely puberulent. Winter bud scales velutinous. Petiole 1.5-3 cm; leaf blade elliptic to oblong, 10-20 × 5-9 cm, thickly papery to nearly leathery, base acute and inaequilateral, margin serrate except basally entire, apex mucronate; midvein abaxially conspicuously raised, adaxially slightly impressed; secondary veins 14-20. Female inflorescences ca. 20 cm. Infructescence rachis 4-5 mm thick. Cupule subglobose, 3.5-4(-5) cm in diam., wall ca. 1.5 mm thick; bracts spinelike, congested, entirely covering cupule, 1-1.5 cm, 3- or 4-angled in cross section, free or base connate into bundles, nearly glabrous. Nut 1 per cupule, broadly conical, 1.4-1.6 cm, apex cuspidate; scar basal. Fl. Mar-May, fr. Oct-Dec of following year.

Broad-leaved evergreen forests; 500-800 m. SE Xizang (Mêdog Xian), S Yunnan [NE India, NE Myanmar]