Salicaceae
楊柳科
特徵描述
註：依本站目前採用的分類系統，本科部分屬在《Flora of Taiwan》中分屬不同科，因此以下依植物誌使用的科名分列特徵描述。
[ Flacourtiaceae 大風子科 ]
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
[ Salicaceae 楊柳科 ]
作者
YANG, KUOH-CHENG and HUANG, TSENG-CHIENG
型態特徵
Dioecious shrubs to trees. Leaves deciduous, simple, usually alternate, with deciduous stipules. Aments ascending or pendulous, developing before or with the leaves in early spring, solitary. Flowers simple, lacking a perianth, each subtended by a bract. Gland as protuberant nectary or cup-shaped disc. Stamens 2-30, free or connate. Ovary superior, bicarpellate, unilocular, stipitate or sessile; style present or absent; stigmas 2, entire or bifid, placentae parietal or basal. Capsules bivalvate. Seeds small; endosperm absent; embryo straight.
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.
Monotypic, native in East Asia: China, Japan and Taiwan.
