Psoralea cyphocalyx A. Gray

Pediomelum cyphocalyx (A. Gray) Rydberg
Psoralea cyphocalyx A. Gray, Bost. Jour. Nat. Hist. 6: 172. 1850. ? Psoralen' palmata Buckl. Proc. Acad. Phila. 1861: 451. 1862. Lotodes cyphocalyx Kuntze, Rev. Gen. 194. 1891.
A perennial, with a tuberous globular or ellipsoid root sometimes 2 cm. thick; stem 5-10 dm. high, simple below, branched above, strigose; leaves digitately 3-5-foliolate; stipules subulate or linear, 8-10 mm. long; petioles 1-6 cm. long; leaflets linear, 4—10 cm. long, 5-8 mm. wide, with numerous small glands, glabrous above, strigose beneath; peduncles 2-5 cm. long; spikes short and dense, 2-4 cm. long; bracts lanceolate or ovate-cuspidate, 6-8 mm. long, conspicuously glandular-punctate; calyx about 8 mm. long; lobes lanceolate, acuminate, nearly equal; corolla about 1.5 cm. long, similar to that of the preceding; pod rounded-ovoid, with a broad straight beak, 8 mm. long, densely punctate, sparingly strigose; seed dark-brown, nearly orbicular, compressed.
Type locality: Rocky prairies on the Cibolo [Texas]. Distribution: Texas.

Perennial, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Tubers or tuberous roots present, Nodules present, Stems erect or ascending, Stems less than 1 m tall, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules green, triangulate to lanceolate or foliaceous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules free, Leaves compound, Leaves palmately 2-3 foliate, Leaves palmately 5-11 foliate, Leaf or leaflet margins entire, Leaflets 3, Leaflets 5-9, Leaves glandular punctate or gland-dotted, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescences spikes or spike-like, Inflorescence axillary, Bracts conspicuously present, Bracts hairy, Flowers zygo morphic, Calyx 5-lobed, Calyx gland-dotted or with glandular spot, Calyx gibbous, inflated, or spurred, Calyx hairy, Petals separate, Corolla papilionaceous, Petals clawed, Petals blue, lavander to purple, or violet, Banner petal ovoid or obovate, Banner petal auriculate, Wing petals narrow, oblanceolate to oblong, Wing petals auriculate, Wing tips obtuse or rounded, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Style hairy, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit oblong or ellipsoidal, Fruit enclosed in calyx, Fruit beaked, Fruit hairy, Fruit gland-dotted or with gland-tipped hairs, Fruit 1-seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.

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