14 NORTH AMERICAN FI<ORA [Volume 24 



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 rounded- 

 obovate- keel 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. 



Illustration: Britt. & Brown, 111. Fl./. 2087. 



3. Psoralidium Purshii (Vail) Rydberg. 



Lotodes ellipUcum latifolium Kuntze Rev Gen 193 1891. 



Psoralen Purshii Vail, Bull. Torrey Club 21: 94 ^i. 



Psoralea lanceolata Purshii Piper .Piper & Beattie, Fl. Mouse Reg. UK. 1901 . 



Psoi-o/eo touceoiata scabra Piper, Contr. U. S. Nat. Herb. 11. 364. 1906. 



A perennial, with a creeping rootstock; stem adsurgent or erect, glandular-punctate and stri- 

 gose 1-6 dm. high; leaves digitately 3-foliolate; stipules lanceolate or subulate, 4-7 mm. long, 

 leaflets 1 5-4 cm. long, obovate or broadly oblanceolate or those of the upper leaves narrower, 

 etu or mucronate at the apex, sparingly strigose and conspicuously punctate peduncles 

 S em long; racemes rather dense, 1-2 cm. long; bracts minute ; calyx 2 mm. long, strigose and 

 ciliate on the margin, scarcely one third as long as the tube; corolla about 5 mnL long white; 

 banner rounded-obovate ; pod globose, fully 5 mm. long, densely long-villous, glandular-warty, 

 seed globose, light-brown. 



Type locality: Empire City, Nevada. 



Distribution; Idaho and Washington to Wyoming and Arizona. 



4. Psoralidium stenostachys Rydberg. 



Psoralea stenostachys Rydb. Bull. Torrey Club 40: 46. 1913. 



A perennial, with a horizontal rootstock ; stem adsurgent or erect, branched, sparingly stri- 

 gose and glandular-dotted, 3-5 dm. high; leaves digitately 3-foliolate ; stipules subulate 4-6 

 mm. long early deciduous; petioles 1-3 cm. long; leaflets oblanceolate, 2-4 cm. long from 

 rounded and mucronate to acute at the apex, sparingly strigose ^^"^ ^^T 

 punctate; peduncles 5-15 cm. long; racemes elongate, many-flowered, lax, 3-7 cm. 1«W. «*£ 

 densely white-strigose and ciliate; tube 1.5 mm. long; teeth 0.5 mm. long triangular acute 

 corolla white, fully 4 mm. long; banner orbicular; keel purplish-tipped; pod globose, densely 

 white-villous. 



Type locality: Government Well, Toole County, Utah. 



Distribution: Northern Utah. 



5. Psoralidium stenophyllum Rydberg. 



Psoralea slenophylla Rydb. Bull. Torrey Club 40: 46. 1913. 



A perennial, with a horizontal branched rootstock; stem simple, about 3 dm. high slender 

 sparingly strigose and glandular-punctate; leaves digitately 3-foliolate or the lower 5-foho ate 

 stipTs Leaf to subulate, 3-8 mm. long; petioles 3-4 cm. long; leaflets «™££^ *■« 

 cm long, about 2 mm. wide, glandular-punctate and sparingly strigose; peduncles 8-10 cm 

 ong; rac mes elongate, 5 cm. long or longer, lax; pedicels usually longer than the £b»£*£ 

 sparingly strigose conspicuously punctate, nearly 2 mm. long; lobes triangular, ciliate on the 

 marSntacut g e, half as long as the tube; corolla about 4 mm. long, white; ovary sparingly 

 hairy. 



Type locality: Near Wilson Mesa, Grand County, Utah. 



Distribution: Known only from the type locality. 



6. Psoralidium linearifolium (T. & G.) Rydberg. 



Psoralea Unearifolia T. & G. Fl. N. Am 1 : 300. 1838. 



Psoralea Uneanfulia robusla Coult. Contr U. S. Nat. Herb. 1. 34. 1H9U. 



Lotodes linearifolium Kuntze, Rev. Gen. 194. 1891. 



A perennial, with a creeping rootstock; stem 3-8 dm. high, sparingly glandular-dotted 

 sparingly strigose or glabrate, striate, with long slender branches; leaves digitately 3-foholate or 



