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Paulownia Sieb. et Zucc.

泡桐属

Description from Flora of China

Trees, deciduous, evergreen in tropics. Bark smooth with conspicuous lenticels when young, longitudinally splitting with age. Branches opposite, without terminal buds. Leaves opposite, occasionally 3 in a whorl; petiole long; leaf blade entire or shallowly 3-5-lobed, margin undulate and often serrate when young. Inflorescences a large pyramidal to cylindric thyrse. Cymes (1-)3-5(-8)-flowered, pedunculate or not. Calyx campanulate or obconical, hairy; lobes 5, subequal, upper 1 enlarged. Corolla purple or white, funnelform-campanulate to tubular-funnelform; tube base constricted and slightly curved; limb 2-lipped; lower lip elongated and 3-lobed; upper lip yellow, 2-lobed. Stamens 4, didynamous; filaments included, twisted near base; anthers divergent. Ovary 2-loculed. Style nearly as long as stamens. Capsule loculicidal, 2-valved or incompletely 4-valved; pericarp thin or thick and woody. Seeds small, numerous, membranous winged; endosperm sparse.

Seven species: mostly in China with one species extending to Laos and Vietnam; six species in China.

Because of the extensive cultivation of most species, it is often difficult to determine the precise wild distribution.

标本园 Specimens Garden, 引种苗圃 Introducing Plants Nursery

Lower Taxon


 

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