Introduction to plants of the genus Cassia

Trees, shrubs, subshrubs or herbs. The leaves are clustered, even-numbered pinnately compound leaves; there are often glands on the petiole and rachis; the leaflets are opposite, sessile or with short stalks; the stipules are diverse and there are no small stipules. Flowers nearly actinosymmetric, usually yellow, forming axillary racemes or terminal panicles, or sometimes 1 to several flowers clustered in leaf axils; bracts and bracteoles are diverse; calyx tube is short, 5-lobed, imbricate Arranged; petals are usually 5, nearly equal or the lower 2 are larger; stamens (4-) 10, often unequal, some of which have degenerated anthers, with anthers on their back or base, with holes or short longitudinal lobes; ovary is slender , sometimes twisted, sessile or stalked, with multiple ovules, style inwardly curved, and stigma small. Pods have various shapes, cylindrical or flat, rarely 4-ribbed or winged, woody, leathery or membranous, 2-valved or undehiscent, with transverse partitions between seeds on the inner surface; seeds grow horizontally or vertically, with endosperm. .

About 600 species are distributed in tropical and subtropical regions around the world, with a few distributed in temperate regions. More than 10 species are native to my country, including more than 20 species that have been introduced and cultivated, and are widely distributed in various provinces in the north and south.

Type species: Cassia fistula Linn. Cassia agnes (de Wit) Brenan

Cassia alata Linn.

Cassia agnes (de Wit) Brenan Cassia auriculata Linn.

Cassia bicapsularis Linn.

Cassia didymobotrya Fresen.

Cassia fistula Linn.

Cassia floribunda Cav.

Cassia fruticosa Mill.

Cassia glauca Lam.

hair Cassia hirsuta Linn.

Cassia leschenaultiana DC. Cassia mimosoides Linn.

Cassia multijuga Rich.