目前为止，中国西南野生生物种质资源库共保藏该物种: 种子6份; DNA材料6份; DNA1份;

• 科:豆科    Fabaceae
• 属:决明属    Cassia
• 种:腊肠树   Cassia fistula

1. Cassia fistula Linnaeus, Sp. Pl. 1: 377. 1753. 腊肠树 la chang shu Trees, deciduous, to 15 m tall. Leaves 30-40 cm, with 3 or 4 pairs of leaflets; leaflets adaxially shiny, broadly ovate or ovate-oblong, 8-13 × 4-8 cm, leathery, both surfaces puberu­lent when young, glabrous when mature, base broadly cuneate, apex acute. Racemes axillary, 20-40(-60) cm, lax, pendent, many flowered; flowers 3.5-4 cm in diam. Pedicels 3-5 cm, slender. Sepals narrowly ovate, 1-1.5 cm, reflexed at anthesis. Petals golden yellow, broadly ovate, subequal, 2.5-3.5 cm, shortly clawed. Stamens 10, 3 long with curved filaments 3-4 cm, anthers ca. 5 mm, exceeding petals, 4 short with straight filaments 6-10 mm, reduced stamens with minute anthers. Ovary stalked, strigulose; stigma small. Legume pendulous, blackish brown, terete, sausage-shaped, indehiscent, 30-60 cm, 2-2.5 cm in diam. Seeds numerous, separated by papery septa, glossy brown, elliptic, flattened. 2n = 28.Cultivated in S and SW China [native to India; cultivated through­out the tropics].This is a common ornamental tree in the southern region. The bark contains tannin, a source of red dye. The fruit pulp and seeds are used medicinally as a laxative. The wood is hard and durable and is used for props, bridges, and farm tools.【引自：Flora of China】

落叶小乔木或中等乔木，高可达15米；枝细长；树皮幼时光滑，灰色，老时粗糙，暗褐色。叶长30-40厘米，有小叶3-4对，在叶轴和叶柄上无翅亦无腺体；小叶对生，薄革质，阔卵形，卵形或长圆形，长8-13厘米，宽3.5-7厘米，顶端短渐尖而钝，基部楔形，边全缘，幼嫩时两面被微柔毛，老时无毛；叶脉纤细，两面均明显；叶柄短。总状花序长达30厘米或更长，疏散，下垂；花与叶同时开放，直径约4厘米；花梗柔弱，长3-5厘米，下无苞片；萼片长卵形，薄，长1-1.5厘米，开花时向后反折；花瓣黄色，倒卵形，近等大，长2-2.5厘米，具明显的脉；雄蕊10枚，其中3枚具长而弯曲的花丝，高出于花瓣，4枚短而直，具阔大的花药，其余3枚很小，不育，花药纵裂。荚果圆柱形，长30-60厘米，直径2-2.5厘米，黑褐色，不开裂，有3条槽纹；种子40-100颗，为横隔膜所分开。花期6-8月；果期10月。【引自：中国植物志】