特徵描述
作者
CHANG, CHING-EN
型態特徵
Trees or shrubs. Leaves alternate, estipulate, mostly pinnate, usually not glandular punctate; leaflets opposite or alternate, usually quite entire and more or less oblique at base. Flowers usually unisexual (plant dioecious), rarely hermaphroditic, usually in axillary cymose panicles; calyx 3–6-lobed, or with free sepals, usually imbricate in bud; corolla contorted or imbricate, the petals 4–5 (rare 3 or 6 or more), distinct or connate, or adnate to the staminal tube and then valvate; stamens 5–10, hypogynous, mostly monadelphous by the connate filaments (distinct in Cedrela and Toona), the anthers erect, usually sessile on the tube, included or exserted, 2-celled, longitudinally dehiscing; hypogynous disc tubular, annular or obsolate, free or connate with the ovary, ovary usually free, 2–5 celled, the style single, the stigma disciform or capitate; ovules 1–2 in each cell or more, collateral or superposed. Fruit a berry, capsule, or rarely a drupe. Seeds often winged, endosperm fleshy or none.
屬
About 50 genera and 800 species, mostly tropical, widely spread over both hemispheres.
參考文獻
Melia 楝屬
作者
CHANG, CHING-EN
型態特徵
Deciduous trees; leaves 2–3-pinnate, the leaflets toothed or entire. Flowers panicle, axillary; pubescence often stellate-mealy; calyx short, 5–6-lobed, imbricate; petals 5–6, free, spathulate-oblong, patent, imbricate in bud; staminal tube cylindrical, dilated at base and apex, 10- or 12-striate and toothed; anthers 10 or 12, included or partly exserted, short, inserted near apex; disc annular; ovary 3–6 celled, the cells alternate with the sepals when equal in number to them, the style slender, nearly as long as the tube, the stigma capitate; ovules 2, superposed. Fruit drupaceous. Seeds with thin fleshy endosperm.
