Lemon Scurfpea

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.