Pagumpa Milkvetch

Hamosa ensiformis (M. E. Jones) Rydb. Bull. Torrey Club
54:21. 1927. Astragalus ensiformis M. E. Jones, Proc. Calif. Acad. II. 5: 658. 1895.
A perennial, with a scaly rootstock; stem about 1 dm. high, purplish, sparingly strigose; leaves 5-8 cm. long, ascending; stipules large, broadly ovate, 1 cm. long, scarious, veiny; leaflets 13-17, green, oval or elliptic, rounded at the apex, 1-1.5 cm. long, glabrous above, sparingly strigose-canescent beneath; peduncles 5-8 cm. long, erect; bracts lanceolate, brownish-purple, 3 mm. long; pedicels short; calyx pubescent with dark and light hairs intermixed, the tube 5 mm. long, the teeth lanceolate, 1 mm. long; corolla unknown; pod linear-oblong, falcate, 2-2.5 cm. long, 5-6 mm. wide and 3 mm. thick, strigose, elliptic in cross-section, with prominent sutures.
Type locality: Above Pagumpa, Arizona. Distribution: Known only from the type locality.

Perennial, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems erect or ascending, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Stems with 2-branched hairs, dolabriform, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules membranous or chartaceous, Stipules persistent, Stipules free, Leaves simple, or appearing so, Leaves compound, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 1, Leaflets 2, Leaflets 3, Leaflets 4, Leaflets 5-9, 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 blue, lavander to purple, or violet, Banner petal narrow or oblanceolate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel petals auriculate, spurred, or gibbous, Keel tip s obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Style persistent in fruit, Fruit a legume, Fruit freely dehiscent, Fruit oblong or ellipsoidal, Fruit or valves persistent on stem, Fruit exserted from calyx, Fruit beaked, Fruit hairy, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.