Indigofera sphaerocarpa A. Gray

Indigofera sphaerocarpa A Gray, PI. Wright. 2:
37. 1853.
A shrub, 6-12 dm. high; branches angled, more or less ferruginous-dotted or streaked; stipules subulate, 1-2 mm. long; leaves 5-10 cm. long; rachis and petiole ferruginous-strigose; leaflets 13-17, oblong, rounded and mucronate at the apex, acute at the base, 1-2 cm. long, 3-7 mm. wide, glabrous above, strigose beneath; racemes equaling or longer than the leaves; calyx 1.5 mm. long, ferruginous-strigose; corolla 6-7 mm. long, ferruginous-strigose without; pod rounded-ovoid or subglobose, 3-3.5 mm. long, 2.5 mm. thick, 1-seeded; seed globose, 2 mm. thick.
Type locality: Santa Cruz, Sonora.
Distribution: Arizona, Sonora, and Chihuahua.

Perennial, Shrubs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems erect or ascending, Stems or branches a rching, spreading or decumbent, Stems less than 1 m tall, Stems 1-2 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Stems with 2-branched hairs, dolabriform, Leaves alternate, Leaves petiolate, Stipules inconspicuous, absent, or caducous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules free, Leaves compound, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 10-many, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals pinkish to rose, Petals red, Petals orange or yellow, Banner petal ovoid or obovate, Wing petals narrow, oblanceolate to oblong, Wing petals auriculate, Wing tips obtuse or rounded, Keel petals auriculate, spurred, or gibbous, Keel abruptly curved, or spirally coiled, Keel tips obtuse or rounded, not beaked , Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit indehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit coriaceous or becoming woody, Fruit exserted from calyx, Fruit inflated or turgid, Fruit internally septate between the seeds, Fruit hairy, Fruit 1-seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.