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FOC | Family List | FOC Vol. 10 | Fabaceae

12. Chamaecrista Moench, Methodus. 272. 1794.

山扁豆属 shan bian dou shu

Herbs or suffrutescent herbs, rarely small trees. Leaves abruptly pinnate; leaflets opposite; foliar glands usually present, disk- or cup-shaped, rarely flat. Flowers yellow or red. Sepals 5. Petals 5, unequal. Stamens 10 to 5 fertile, filaments straight, anther thecae ciliolate along suture, dehiscent terminally by slit or pore. Legume elastically dehiscent, valves coiling. Seeds with either smooth or pitted testa, usually exareolate.

About 270 species: mostly (ca. 240) indigenous to America, with only a few (ca. 30) in tropical Asia; three species (one introduced) in China.

1 Petiolar gland distinctly stipitate.   1 C. pumila
+ Petiolar gland sessile, discoid, raised or slightly flat   (2)
2 (1) Rachis of leaves not canaliculate; leaflets 20-50 pairs, 3-4 mm; ovary with short, stiff, appressed hairs; legume with scattered, appressed hairs.   2 C. mimosoides
+ Rachis of leaves canaliculate; leaflets 10-25 pairs, 8-13 mm; ovary woolly with long and short, thin hairs; legume with long and short, non-appressed hairs.   3 C. leschenaultiana

Lower Taxa


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