to the Rocky Mountains. 253 



GfcAMINEJE. 



456. Cenchrus echinatus, L. Willtl. sp.pl. 1. p. 117. 

 Torr.fl. i. p. 68. Sources of the Canadian. 



Obs. Extremely annoying to travellers, the spines of the 

 flowers adhering tenaciously to the dress, and penetrating to 

 the skin. 



457. Spartina cynosuroides, Willd. On the Platte. 

 Obs. Mr. Nuttall informs me that it was this species, and 



not S. glabra, which he found on the upper Missouri. 



45S. Miegia macrosperma, Pers. syn. i. p. 102. Purshfl. 

 i. p. 59. On the Arkansa and Canadian. 



459. Agrostis cryptandra, &c. vid. Ann. Lye. i. p. 

 151. and 152. 



460. PoLYPOGON RACEMOSUS, Nutt. ToiT. fl. i. p. 92. 



On the Missouri. 



461. Aristida pallens, Nutt. About the Forks of 

 the Platte. 



462. A. fasciculata, Torr. in Ann. Lye. i. p. 154. 

 On the Canadian. 



463. Beckmanniaereciformis, Jacq. Nutt. gen. i. -p. 48. 

 On the Platte. 



464. Eriocoma cuspidata, Nutt. gen. i. p. 40. On the 

 Platte. 



465. Stipa barbata, Michx.fl. i. p. 53. Sources of the 

 Platte and Canadian. 



Obs. Grows with the Cenchrus echinatus, and like that 

 plant is very troublesome ; the bearded awns adhering to and 

 penetrating the dress. 



466. KffiLERiA nitida, Nutt. gen. i. p. 74. On the 

 Missouri. 



467. Tricuspis seslerioides, Torr.fl. i. p. 118. Poa 

 seslerioides, Michx. fl. i. p. 68. Sources of the Platte. 



