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10. Cassia Linnaeus, Sp. Pl. 1: 376. 1753.
决明属 jue ming shu
Trees or large shrubs. Leaves spirally arranged, often distichous, abruptly pinnate; rachis and petioles without glands; leaflets opposite, without stipels. Flowers in terminal panicles on main shoots or racemes on short side shoots; pedicels with 2 bracteoles at or shortly above base. Calyx 5-merous; sepals reflexed at anthesis. Corolla zygomorphic; petals 5. Stamens 10; filaments of 3 abaxial antesepalous stamens sigmoidally curved, usually longer than their anthers, dehiscent by slits; remaining 7 filaments straight and short, with anthers mostly dehiscent by basal pores. Legume elongate, cylindric or compressed, indehiscent. Seeds numerous, 1- or 2-seriate; funicle filiform.
About 30 species: tropical regions; two species (one introduced) in China.
Because of insufficient materials for comparison, Cassia lancangensis Y. Y. Qian (Acta Bot. Austro Sin. 6: 23. 1990) could not be treated here.
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Inflorescence 20-40(-60) cm; leaves with 3 or 4 pairs of leaflets; legume 2-2.5 cm in diam.. |
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1 C. fistula |
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Inflorescence shorter than 15 cm; leaves with 5-12 pairs of leaflets; legume less than 1.5 cm in diam.. |
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2 C. javanica |
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Lower Taxa
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