Rattlebox

Himalaya (Kumaun to Bhutan), India, S.E. Asia, China, Malaysia.

300-1400 m

Annual, Herbs, Taproot present, Nodules pres ent, Stems erect or ascending, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Stems winged or with decurrent stipules, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules persistent, Leaves simple, or appearing so, Leaf or leaflet margins entire, Leaflets 1, Leaves hairy on one or both surfaces, Inflorescences racemes, Bracts conspicuously present, Bracteoles present, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals orange or yellow, Banner petal suborbicular, broadly rounded, Wing petals narrow, oblanceolate to oblong, Keel abruptly curved, or spirally coiled, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens or anthers dimorphic, alternating large and small, Stamens monadelphous, united below, Filaments glabrous, Style terete, Style hairy, Fruit a legume, Fruit stipitate, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ell ipsoidal, Fruit exserted from calyx, Fruit inflated or turgid, Fruit glabrous or glabrate, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.