Palmleaf Indian Breadroot

Psoralidium digitatum (Nutt.) Rydberg
Psoralea digitala Nutt.; T. & G. Fl. N. Am. 1: 300. 1838. Psoralea campestris Nutt.; T. & G. Fl. N. Am. 1: 301. 1838. Lotodes campestre Kuntze, Rev. Gen. 194. 1891. Lotodes digitatum Kuntze, Rev. Gen. 194. 1891.
A perennial, with a rootstock; stem erect, simple below, with ascending-spreading branches, 3-S dm. high, appressed-canescent throughout ; leaves mostly digitately 5-foliolate or those of the branches 3-foliolate; stipules lanceolate, 5-10 mm. long; petioles 2-5 cm. long; leaflets linear or linear-oblanceolate, 2-5 cm. long, 3-5 mm. broad, glabrous above except the midvein, densely silky beneath ; peduncles 10-15 cm. long ; spikes interrupted, 3-6 cm. long ; bracts broadly obovate, 5 mm. long, nearly as broad, sparingly glandular, abruptly short-acuminate; flowers 2-4 at each node, subsessile; calyx 6-7 mm. long, accrescent in fruit, densely silky; lobes ovatelanceolate, abruptly short-acuminate, the lowest somewhat longer; banner obovate; pod ovoid, 7-8 mm. long, with a flat straight beak; seed ellipsoid, brown, 4-5 mm. long.
Type locality: Sandhills of Red River, Arkansas. Distribution: South Dakota to Colorado, Texas, and Arkansas.

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, Plants gland-dotted or with gland-tipped hairs, Stems solid, Stems or young twigs sparsely to densely hairy, Stems silvery, canescent, tomentose, cobwebby, or wooly, 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 hairy on one or both surfaces, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences racemes, Inflorescences spikes or spike-like, Inflorescence axillary, Bracts conspicuously present, Bracts hairy, Flowers zygomorphic, Calyx 5-lobed, 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 exserted from 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.

Pediomelum digitatum is a species of flowering plant in the legume family known by the common name palmleaf Indian breadroot. It is found in the central United States.