特徵描述
作者
HUANG, TSENG-CHIENG
型態特徵
Herbs, shrubs or trees; branches often quadrangular. Leaves opposite or whorled, seldom altenate, entire; stipules 0. Flowers bisexual, regular or rarely irregular, mostly axillary, solitary or in cymes or panicles; calyx-tube free, persistent, the lobes 3–6, valvate, often with accessory lobes; petals as many as calyx-lobes and inserted at the mouth of calyx, imbricate, or rarely 0; stamens few or many, inserted on the calyx; ovary superior, sessile or stalked, 2–6- or rarely 1-celled, with many, seldom few, ovules in each cell; style simple, the stigma capitate, rarely 2-lobed. Fruit a dehiscent or indehiscent capsule, free or adnate to the base of calyx, 2–6-celled or 1-celled by the imperfection of the partitions; seeds many, various in shape; endosperm 0; embryo straight.
屬
More than 20 genera, widely distributed but most abundant in tropical America; five genera in Taiwan.
參考文獻
Lagerstroemia 紫薇屬
作者
HUANG, TSENG-CHIENG
型態特徵
Trees or shrubs. Leaves often opposite, distichous, entire. Panicles axillary and terminal. Flowers often showy; calyx-tube funnel-shaped, smooth, grooved, angular or subulate, the lobes 6, sometimes 7–9, ovate, subacute, valvate; petals 6 or more, inserted at the summit of the calyx-tube, clawed, wrinkled; stamens numerous, inserted near the bottom of the calyx-tube, the filaments long, exserted; ovary sessile, 3–6-celled; style long, bent, the stigmas capitate; ovules numerous, ascending; placentation axile. Capsules more or less adnate to the calyx, ellipsoid, smooth, 3–6-celled, 3–6-valved; seeds many, elongate and winged.
