特徵描述
作者
LIU, Ho-Yih
型態特徵
Herbs or shrubs, rarely trees or vines; some species hemiparasitic or parasitic. Leaves opposite or alternate, rarely whorled; exstipulate. Flowers in racemes, spikes, or thyrsoid panicles or solitary; perfect, usually irregular. Calyx lobes 5 or 4, rarely 1 or 2 by fusion. Corolla sympetalous, 4 or 5-lobed, often 2-lipped. Stamens epipetalous, usually 4 and didynamous, or 4 fertile and 1 sterile, rarely 2 or 5; anthers 1 or 2-celled, cells distinct or more or less confluent. Disc annular or cup-shaped. Ovary superior, 2-celled; style simple or sometimes forked; stigma capitate, dilated, or 2-lobed. Fruit a capsule, rarely baccate. Seeds small, hilum lateral or ventral.
屬
About 220 genera, worldwide; 25 genera in Taiwan.
參考文獻
Paulownia 泡桐屬
作者
LIU, Ho-Yih
型態特徵
Deciduous trees. Leaves opposite, long-petiolate, entire or shallowly lobed, palmately 3–5-nerved. Flowers in terminal panicles; calyx campanulate, tubular or funnelform, 5-lobed, ebracteolate; corolla purple, yellow or white, tubular-funnelform, bilabiate; upper lip outer in bud; stamens 4, didynamous, included; anthers distinct, 2-celled, cells divaricate; style simple, stigma clavate. Capsule loculicidal, valves 2. Seeds winged.
