《中国植物志》|| 大戟科 EUPHORBIACEAE ||叶轮木属 Ostodes Bl. ||叶轮木 Ostodes paniculata Bl.

1.叶轮木 (海南植物志)
Ostodes paniculata Bl. Bijdr. 620. 1825; Muell. Arg. in DC. Prod, 15 (2): 1115. 1866; Hook. f. Fl. Brit. Ind. 5: 400. 1887; Gagnep. in Lec. Fl. Gen. Indo—— Chine 5: 322, f. 33, 7-9. 1925; Merr. in Lingnan Sci. Journ. 5: 112, 1927; 海南植物志2: 167, 图381.1965, ercl. speczm. Yannan.; 中国高等植物图鉴2: 607. 图2944.1972; Y. T. Chang in Acta Phytotax. Sin. 20: 224. 1982
乔木，高达15米，树皮灰褐色；枝、叶无毛，叶常聚生枝条顶端。叶薄革质，卵状披针形至长圆状披针形，长10-24厘米，宽5-10厘米，顶端渐尖，有时尖头尾状，基部圆形或阔楔形，干后下面苍灰色或灰褐色，侧脉7-8对；叶柄长4-12厘米；托叶早落。花雌雄异株，雄花序聚伞圆锥状，长7-25厘米，雌花序较雄花序短；雄花：萼片 5，3枚较宽，2枚较狭，长3-3.5毫米；花瓣5枚，卵状椭圆形，长约5毫米，白色；腺体离生；雄蕊25枚或更多；雌花：花梗长约12毫米，花后呈棒状增粗；萼片、花瓣与雄花同；花盘环状；子房被长硬毛，花柱3枚，2深裂至中部以下，顶端再分叉。蒴果扁球状，长2-2.5厘米，直径3-3.5厘米，具深3纵沟，被微绒毛且密生疣突，中果皮硬、木质；种子椭圆状，长约1.1厘米，栗褐色，有淡黄色斑纹，平滑，有光泽花期3-5月，果期8-9月。
产于海南。生于海拔400-900米的密林中。南亚次大陆、中南半岛、马来半岛各国、印度尼西亚（爪哇）有分布。

《Flora of China》|| Euphorbiaceae || Ostodes ||叶轮木 Ostodes paniculata

1. Ostodes paniculata Blume, Bijdr. 620. 1826.

叶轮木 ye lun mu

Ostodes kerrii Craib; O. thyrsantha Pax.

Trees, up to 15 m tall, dioecious; bark gray-brown; branches and leaves glabrous. Leaves usually apically clustered; stipules caducous; petiole 4-12 cm; leaf blade ovate-lanceolate to oblong-lanceolate, 10-24 × 5-10 cm, thinly leathery, abaxially glaucous-gray or gray-brown when dry, base rounded or broadly cuneate, apex acuminate or caudate-acuminate; lateral veins 7 or 8. Male thyrses 7-25 cm, female shorter. Male flowers: sepals 5 (3 wider, 2 narrower), 3-3.5 mm; petals 5, ovate-elliptic, ca. 5 mm, white; disk glands free; stamens 20-35. Female flowers ca. 12 mm; sepals and petals as in male; disk annular; ovary hirsute; styles 3, bifid to below middle, apex densely longitudinally grooved. Capsule tomentulose and densely elevated-verrucose; mesocarp hard, woody. Seeds ellipsoidal, ca. 1.1 cm, brown, with stripes of yellowish spots, smooth, glossy. Fl. Mar-May, fr. Aug-Sep.

Montane evergreen forests; 400-1400 m. Hainan, Yunnan [Bhutan, Cambodia, India, Indonesia, Malaysia (peninsular), Myanmar, Nepal, Vietnam].