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FOC | Family List | FOC Vol. 17 | Verbenaceae

18. Sphenodesme Jack, Malayan Misc. 1: 19. 1820.

楔翅藤属 xie chi teng shu

Shrubs, climbing. Hairs simple or stellate. Stems lenticellate when young. Leaves opposite, short petiolate, margin entire. Inflorescences capitate cymes, 3-7-flowered, subtended by a whorl of 5 or 6 prominent involucral bracts. Calyx funnelform, 5-dentate, sometimes enlarged or inflated in fruit. Corolla tube short cylindric; lobes 5 (or 6), narrowly lanceolate to ovate-oblong. Stamens 5(-7); anthers ovate. Ovary imperfectly 2-locular; ovules 2 per locule, pendulous from apex of a placenta bearing axis. Stigma 2-cleft. Fruit indehiscent, small, obovoid to globose, included or nearly included in calyx, 1- (or 2)-seeded.

About 16 species: mainly in tropical and subtropical Asia, four species in China.

1 Cyme 5-flowered; calyx glabrous   1 Sphenodesme pentandra var. wallichiana
+ Cyme 7-flowered; calyx with pilose or stellate hairs.   (2)
2 (1) Hairs simple; involucral bracts oblanceolate-spatulate to spatulate; calyx usually with accessory teeth; fruit hairy   2 Sphenodesme mollis
+ Hairs stellate; involucral bracts spatulate-lanceolate or obovate; calyx without accessory teeth; fruit glabrous.   (3)
3 (2) Leaf blade narrowly elliptic to ovate; involucral bracts oblanceolate; flowers 4- or 5-merous; stamens included   3 Sphenodesme involucrata
+ Leaf blade obovate-elliptic; involucral bracts spatulate-lanceolate; flowers 5- or 6-merous; stamens exserted   4 Sphenodesme floribunda

Lower Taxa


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