to the Rocky Mountains. 170 



lanuginosus ; stipulis a petiolo liberis, oppositifoliis ; foliolii 

 (11-14-jugis) ovato-oblongis, mucronulatis ; pedunculis foliis 

 longioribus ; floribus spicatis, erectis ; leguminibus oblongis, 

 arcuatis, glabris. 



Desc. Root perennial. Whole plant covered with a soft silky pu- 

 bescence. Leaves pinnate; petioles all radical, 4-8 inches long; leaflets 

 ovate-oblong, obtuse, but slightly mucronate, mostly alternate, nearly an 

 inch in length. Stipules lanceolate. Peduncles radical, longer than the 

 leaves. Spikes rather dense, interrupted, 3-4 inches long. Flowers sub- 

 sessile, large, ochroleucous ? Calyx tubular-campanulate, with equal, 

 subulate segments. Carina obtuse. Legume oblong, arcuate, 2-celled 

 coriaceous, smooth. 



Hab. On the Platte. 



Obs. The flowers have faded in our specimens, so that it 

 is impossible to ascertain what was their original colour> 

 which is a circumstance of some importance in this genus. 



94. A. hacEiMosus, Pursh f. ii. p. 740. DC. prod. ii. 

 p. 294. A. galegoides, Nutt. gen. ii. p. 100. With the 

 preceding. This is easil}' distinguished from all the other 

 North American Astragali, by its stipitate triangular legumes. 



95. A. Hypoglottis, L. Nutt. gen. ii. p. 99. DC. 

 prod. ii. p. 281. On the Platte, and about the sources of the 

 Canadian. 



96. A. caryocarpus, Bot. reg. 17G. DC. prod. ii. 

 p. 2S7. A. carnosus, Nutt. gen. ii. p. 100. nee Pursh. 

 With the preceding. According to Mr. Nuttall, the A. car- 

 nosus of Pursh was a species of Sophora, to which, by mis- 

 take, he applied the fruit of this plant. 



97. A. gracilis, Nutt. gen. ii. p. 100. DC. prod. ii. 

 p. 284. A. tenellus, Pursh ji. ii. p. 473. With the pre- 

 ceding. 



9S. Hedysarum canadense, L. Pursh fl. ii. p. 48 J. 

 Desmodium canadense, DC. prod. ii. p. 328. On the Ca- 

 nadian, near its junction with the Arkansa. 



Obs. The genus Desmodium of De Candolle, is taken 



