特徵描述
屬列表
Aphananthe 糙葉樹屬
Celtis 朴屬
Trema 山黃麻屬
Ulmus 榆屬
Zelkova 櫸屬
標本列表
Trema 山黃麻屬
型態特徵
Monoecious, dioecious, or polygamous trees or shrubs. Leaves alternate, serrulate or serrate, base 5-7-veined; stipules free, lateral, caducous. Flowers solitary, in axillary cymes or fascicles, perfect or imperfect; calyx lobes 4 or 5-parted, segments duplicate-valvate or subimbricate; stamens 4-5, filaments erect; ovary sessile, styles terminal, 2-armed; ovules pendulous. Fruit a drupe, ovoid or subglobose; endocarp hard; cotyledons falcate.
Ten to 55 species, tropical and subtropical regions. Three species in Taiwan.
