Senna occidentalis

Plant: Annual undershrub, subglabrous, foetid, few feet high.
Leaves: Alternate, compound, paripinnate; rachis channelled, presence of a gland at the base of the rachis; stipulate, stipules obliquely cordate, acuminate; leaflets 4–5 pairs, size (3.7 cm X 2 cm- 7 cm X 3.5 cm),obate to oblong- lanceolate; acuminate, margin ciliate, glabrous or pubescence.
Inflorescence: Axillary corymb and terminal panicle.
Flowers: Complete, bisexual, slightly irregular, zygomorphic, pentamerous, hypogynous, pedicelate; bractate, bracts white with pinkish tinge, thin, ovate- acuminate, caducous; yellow.
Calyx: Sepals 5, gamosepalous, tube short, 5 lobed, obtuse, glabrous, imbricate, odd sepal is anterior.
Corolla: Petals 5, polypetalous, alternisepalous, sub-equal, with distinct claw, conspicuously veined, ascending imbricate, posterior petal is the innermost.
Androecium: Stamens 10, free, unequal in size, 7 perfect and 3 reduced to staminode, filaments unequal, anther dithecous, basifixed, introrse and dehiscing by terminal pores.
Gynoecium: Carpel 1, ovary superiour, unilocular, many ovuled, marginal placentation; style simple; stigma terminate, capitate.
Fruit: Pod, dehiscent, woody, 12.5 cm X 0.7 cm, glabrous, recurved, subcompressed, distinctly torulose, 23-30 seeded.

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