Madras thorn's description
Description: Trees, to 20 m high. Leaves bipinnate, alternate; stipular spines to 2 cm; rachis 1-3 cm long, pulvinate; pinnae 2, 4-10 mm long, pubescent, with a solitary gland at the top on upperside; leafl ets 2, opposite, 1.5-3.5 × 0.5-1.5 cm, oblong-oblanceolate, inequilateral, base and apex obtuse. Flowers 5 mm across, creamy, heads arranged in axillary or terminal panicled spikes; peduncle to 2 cm. Calyx campanulate, pubescent, lobes 5. Petals 5, to 4 mm, connate in the middle, densely tomentose without. Stamens many, monadelphous; fi laments to 7 mm. Fruit a pod, 8 × 1 cm, circinate or falcate, moniliform, dehiscent; seeds orbicular; aril white.