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Genus :

ALSTONIA

Family :

APOCYNACEAE

Description


Trees, rarely shrubs. Leaves simple, generally whorled, obovate, oblong or lanceolate, entire, glabrous. Inflorescence paniculate or corymbose, terminal cymes. Flowers saver-shaped. Calyx 5-lobed, without scales or glands. Corolla 5-lobed with cylindrical tube, hairy only at the mouth, white or greenish-white. Stamens inserted in the corolla tube. Ovary of 2 distinct carpels, united by the style; stigma short or 2-toothed, ovules numerous. Follicles 2, cylindrical. Seeds many, oblong or linear, usually hairy.

Key to the species

Serial Key Reference
1a. Leaves 3-4 in a whorl; disc present A. macrophylla
1b. Leaves 5-10 in a whorl; disc absent A. scholaris