特徵描述
作者
CHEN, CHING-HSIA
型態特徵
Trees, shrubs, vines or rarely herbs. Leaves usually alternate, pinnately or palmately compound, rare simple; stipules none or in some climbing species present. Flower usually small, unisexual or bisexual, in racemes, panicles or corymbs, actinomorphic or commonly zygomorphic; calyx 4–5, imbricate or valvate sepals; petals 4–5 or wanting, often with hairs or scales at the base inside; hypogynous discs well developed, situated between petals and stamens; stamens usually 8–10, the filaments distinct or united at base; ovary superior, 2–4-celled, with one or more ovules in each cell; placentation axile or parietal, the style simple or divided. Fruit various, drupaceous or capsular, entire or lobed, sometimes winged. Seeds often arillate globose or compressed, albuminous or exalbuminous.
屬
About 150 genera and over 1,500 species, of wide distribution in the tropics and warm region.
參考文獻
Koelreuteria 欒樹屬
作者
CHEN, CHING-HSIA
型態特徵
Deciduous trees. Leaves alternate, estipulate, odd-pinnate or bipinnate compound, the leaflets serrate. Inflorescence of terminal panicle. Flowers yellow, irregular; calyx deeply divided into 5 unequal lobes; petals 4, or only 3 in staminate flowers, lanceolate, strongly reflexed with 2 upturned appendages at base of blade; disc crenate at upper margin; stamens 8 or less, with long distinct filaments; ovary 3-celled with 2 ovules in each cell; the style 3-cleft. Fruit a bladding capsule, loculicidally dehiscent by 3 valves. Seeds roundish and black.
