特徵描述
作者
LI, HUI-LIN and LO, HANN-CHUNG
型態特徵
Trees or shrubs, rarely scandent, mostly inermous, without milky latex. Leaves spirally arranged or distichous, rarely opposite, simple, petioled; blade often with base asymmetric; stipules usually small, rarely large, or absent. Flowers terminal, axillary or on old wood, solitary or in clusters or racemes, subtended by bracts, actinomorphic, bi- or unisexual and dioecious; sepals 3–6, rarely more, free or connate, imbricate or valvate, mostly persistent; petals 3–8, rarely more, or absent, imbricate or valvate; receptacle might deepen in the center, mostly with appendages as disk lobes, fine threads, petal-scales or staminodes; disk present or not, entire, lobed or dissolved into glands; stamens 5 to numerous, hypogynous, mostly free, or monadelphous; anther cells 2, longitudinally dehiscent; ovary mostly superior, rarely semi-inferior or inferior, 1-celled (except Flacourtia) with 2–10 parietal placentas, sometimes incompletely 2–10 celled by deeply penetrating placentas, each with 2 to numerous ovules; styles 1–10, free or connate; stigma sessile. Fleshy or dry berry, drup or loculicidally dehiscent capsule. Seeds 1 to many, sometimes arillate; endosperm copious; embryo axile; cotyledons mostly broad, foliaceous.
屬
Mostly tropics, 84 genera, ca 1,300 species. 6 genera with 6 species in Taiwan.
參考文獻
Idesia 山桐子屬
作者
LI, HUI-LIN and LO, HANN-CHUNG
型態特徵
Deciduous trees; branches thick, grey brown, glabrous. Leaves spirally arranged, large, palmately nerved, white-grey hairy beneath chiefly on the midrib near base; petioles reddish, as long as blade, with two sessile oblong glands at top; stipules small. Flowers terminal and axillary, in yellow puberulent panicles, often somewhat subracemose, yellowish, dioecious; sepals 5–8, imbricate, often with obscure teeth, nearly as long as the stamens; corolla absent; stamens numerous, on a small disk; filaments filiform, free, hairy; ovary superior, globose, glabrous; placentas (3-)5(–6), parietal; ovules numerous; styles 5, spreading, deciduous. Berry. Seeds many.
