Psoralea lanceolata Pursh

Psoralidium lanceolatum (Pursh) Rydberg
Psoralea lanccolala Pursh. Fl. Am. Sept. 475. 1814
Psoralea elliptica Pursh. Fl. Am. Sept. 741. 1814.
Psoralea arenaria Nutt. Gen. 2: 103. 1818.
Psoralea laxiflora Nutt. ; T. & G. Fl. N. Am. 1: 299 1838
? Psoralea scabra Nutt.; T. & G. Fl. N. Am. 1: 300. 1838
Lotodes ellipticum Kuntze, Rev. Gen. 193. 1891.
Lotodes ellipticum angustissimum Kuntze, Rev. Gen. 193. 1891.
A perennial, with a creeping branched rootstock; stem 1.5-4 dm. high, aromatic, glandularpunctate throughout, sparingly strigose; leaves palmately 3-foliolate; stipules linear-lanceolate to subulate, 3-10 mm. long; petioles 1-2 cm. long; leaflets 1-4 cm. long, oblanceolate to linear or those of the earlier leaves obovate-oblanceolate, acute to rounded and mucronate at the apex, sparingly strigose, especially along the veins beneath, and conspicuously punctate; peduncles 2-5 cm. long; racemes short, 1-2.5 cm. long; bracts minute; calyx campanulate, sparingly strigose, 2 mm. long; lobes nearly equal, obtuse, glandular-punctate; corolla white or slightly purple-tinged, 5-6 mm. long; banner almost orbicular; blades of the wings obliquely oblongoblanceolate; keel-petals scarcely lobed at the base and usually purple-tipped; stigma capitate; pod globose, 5 mm. long, conspicuously glandular-warty, sparingly strigose or glabrate, the beak short, erect.
Type locality: Banks of the Missouri [probably Montana]
Distribution: Missouri to Saskatchewan, Alberta, and Arizona

Psoralidium micranthum (A. Gray) Rydberg
Psoralea micranlha A. Gray, in Torr. Pacif. R. R. Rep. 477 1857 Lotodes micranthum Kuntze, Rev. Gen. 194. 1891.
A perennial, with a creeping branched rootstock; stem glabrous or sparingly strigose, glandular-punctate; leaves digitately 3-foliolate; stipules subulate, early deciduous; petioles' 1.5-3 cm. long; leaflets narrowly linear, 1-5 cm. long, 1-3 mm. wide, sparingly strigose or glabrous, acute at both ends; peduncles 2-4 cm. long; racemes more lax than in the preceding, 2-5 cm. long'; calyx campanulate, sparingly strigose, 1.5 mm. long; lobes rounded-oval, half as long as the tube, rounded at the apex; corolla 5 mm. long, white except the tip of the keel; banner roundedobovatekeel purple-tinged at the tip; pod globose, fully 5 mm. long, with a short erect beak, glandular-warty. (Perhaps not distinct from the preceding species.)
Type locality: On the Canadian. .
Distribution: Oklahoma to southern Utah, Arizona, and Texas.

Perennial, Stems woody below, or from woody crown or caudex, Plants with rhizomes or suckers, Nodules p resent, Stems erect or ascending, Stems less than 1 m tall, Plants gland-dotted or with gland-tipped hairs, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules inconspicuous, absent, or caducous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules free, Leaves compound, Leaves palmately 2-3 foliate, Leaf or leaflet margins entire, Leaflets 3, Leaves glandular punctate or gland-dotted, Leaves glabrous or nearly so, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences racemes, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals white, Petals blue, lavander to purple, or violet, Petals bicolored or with red, purple or yellow streaks or spots, Banner petal ovoid or obovate, Banner petal suborbicular, broa dly rounded, Banner petal auriculate, Wing petals narrow, oblanceolate to oblong, Wing petals auriculate, Keel petals auriculate, spurred, or gibbous, Stamens 9-10, Stamens or anthers dimorphic, alternating large and small, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit indehiscent, Fruit orbicular to subglobose, Fruit coriaceous or becoming woody, Fruit exserted from calyx, Fruit beaked, Fruit glabrous or glabrate, Fruit gland-dotted or with gland-tipped hairs, Fruit 1-seeded, Seeds reniform, Seed surface smooth, Seeds olive, brown, or black.

Psoralidium lanceolatum (syn. Ladeania lanceolata) is a species of flowering plant in the legume family known by several common names, including lemon scurfpea, wild lemonweed, and dune scurfpea.

Taken in the Great Sand Dunes National Park, Colorado USA

It is native to western North America from central Canada to California to Texas, where it grows in sandy habitat, such as alluvial plains and sagebrush.

It is a perennial herb with a branching, heavily glandular stem growing 30 to 60 centimeters tall. The leaves are palmately compound, each made up of usually three linear or lance-shaped leaflets borne on a short petiole. The inflorescence is a raceme of flowers emerging from a leaf axil. Each flower is under a centimeter long with a pealike corolla in shades of light purple-blue to white. The fruit is a hairy, glandular, spherical legume.

The Zuni people eat the fresh flowers to treat stomachaches.

Psoralea lanceolata là một loài thực vật có hoa trong họ Đậu. Loài này được Pursh miêu tả khoa học đầu tiên.