to the Rocky Mountains. 



176 



This plant has but little of the habit of Trigonella. It 

 should, [ think, be referred to a distinct genus. I have 

 specimens also from S.Carolina, collected by Mr. Schweinitzi 

 so that its geographical range is very extensive. 



70. Psoralea arena ua, JYutt. gen. ii. p. 103. DC. 

 prod. ii. p. 219. P. lanceolata and P. elliptica, Purshfl. ii. 

 p. 475. et 741. Sandy plains of the Arkansa and Platte. 



71. P. esculenta, Pursh JYutt. gen. ii. p. 102. DC. 

 prod. ii. p. 219. (Pomme blanche ) On the Missouri and 

 Arkansa. Used as food by the Pawnees and Canadian 

 traders. 



72. P. cuspidata, Pursh JYutt. gen. ii. p. 102. DC. 

 prod. ii. p. 219. With the preceding. 



73. P. canescens, Michx. fi. ii. p. 57. DC. prod. ii. p* 

 220. With the preceding. 



74. P. onobrychis, JYutt. gen. ii. p. 104. DC. prod. 

 ii. p. 210. With the preceding. 



75. P. Jamesii, foliis trifoliolatis ; foliolis obovatis, ob- 

 tussimis, basi cunciformibus, integerrimis, utrinque sericeis ; 

 petiolis pubescentibus ; spicis capitatis ; bracteis oblongis, 

 acuminatis; calycibus hirsutissimis dentibus subulatis, sub- 

 aequalibus. 



Desc. Suffruticose. Stems numerous, about 4 inches high, covered 

 with a silky appressed pubescence. Leaves lernate ; petioles half an inch 

 long, subterete, with subulate stipules at the base; leaflets very obtuse, 

 cuneate at the base, silky on both sides, about as long as the petioles. 

 Flowers in dense capitate spikes which terminate the branches, sessile. 

 Bracts shorter than the flowers, deciduous. Calyx very hairy, not glan- 

 dulous ; segments long, subulate, nearly equal. Stamens monadelphous. 

 Germen 1-seeded, acuminate with the style ; stigma simple, smooth. 



Hab. Sandy plains of the Canadian. 



Obs. This small but beautiful plant is probably not a true 

 Psoralea, though it agrees, in many respects, with the cha- 

 racters of that genus. It is suffruticose and apparently de- 

 cumbent. The stamens are constantly monadelphous, in 



