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FOC | Family List | FOC Vol. 11 | Oxalidaceae

2. Biophytum Candolle, Prodr. 1: 689. 1824.

感应草属 gan ying cao shu

Herbs, annual or perennial. Stem sometimes woody at base, simple or dichotomously branched. Stipules filiform. Leaves crowded or almost whorled apically on stems, even-pinnate; petiole basally swollen; leaflets opposite, sessile; leaflet blade apices rounded and mucronate; apical leaflet blade reduced to an awn. Inflorescences umbellate, pedunculate or sessile. Sepals lanceolate, persistent in fruit, apex acuminate. Petals yellow, white, or rarely purple. Ovary subglobose. Capsule ovoid to oblong, loculicidally dehiscent, sometimes splitting to base into 5 spreading valves, each valve with several seeds. Seeds brown, often with small tubercles.

About 50 species: tropical and subtropical regions of the world; three species in China.


1 Inflorescences sessile.   3 B. umbraculum
+ Inflorescences long pedunculate   (2)
       
2 (1) Stem dichotomously branched, rarely unbranched; leaflet blades with long recurved trichomes on both surfaces, base asymmetric; pedicel 3-10 mm; petals white.   1 B. fruticosum
+ Stem unbranched; leaflet blades with short recurved trichomes or glabrous, base almost symmetric; pedicel ca. 2 mm; petals yellow.   2 B. sensitivum

Lower Taxa


 

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