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
Xylosma 柞木屬
作者
LI, HUI-LIN and LO, HANN-CHUNG
型態特徵
Trees or shrubs, often with spines in axils. Leaves spirally arranged, chartaceous, pinnately nerved, mostly serrate-dentate; petioles short; stipules absent. Flowers axillary, in short, few-flowered racemes, mostly solitary, unisexual and dioecious; pedicels articulate near insertion, with small bracts; sepals 4–8, subconnate, imbricate, ciliate; petals absent; disk fleshy, more or less regularly 4–8-lobed or entire. Staminate flowers: stamens numerous, usually exserted; anthers subglobose, basifixed, subgibbous; pistillodes absent. Pistillate flowers: ovary sessile, 1-locular; placentas 2(–6), few-ovuled; stigma thick, 2–3-lobed, sessile or on a short style. Fruit a rather dry berry; pericarp mostly thin-coriaceous. Seeds usually few, flat, obovate, aril thin.
