202 Plants collected during ajovrney 



those mentioned above, were collected by Dr. James on the 

 Platte and Canadian ; but the specimens are too imperfect to 

 be determined with certainty. One of them has the appear- 

 ance of CE. biennis, but the flowers are much larger, and the 

 tube of the calyx about four inches long. 



PORTULACEiE. 



152. Portulaca oleracea, L. JYuit. gen. ii. p. 6. 

 Sources of the Platte and Canadian. Indigenous. Mr. 

 Nuttall found it on the Missouri. In the Atlantic States, it is 

 certainly a naturalized plant. 



153. P. pilosa, L. Muhl. cat. ed. 2. p. 48. With the 

 preceding ; common. 



Obs. The specimens of this plant were all in fruit, so that 

 the color of the corolla cannot be ascertained. I have speci- 

 mens also from North Carolina, collected by the Rev. Mr. 

 Schweinitz. 



154. Talinum, n.sp. JVutt. mss- On the Canadian. A 

 polyandrous species, with large purple flowers. 



OPUNTIACE^E. 



155. Cactus ferox, JVutt. gen. i. p. 296. C. Bonplandii, 

 Humb. and Bonpl. ? Kunth syn. iii. p. 372. ? On the arid 

 plains of the Platte and Arkansa, and on the Rocky Moun- 

 tains, at a great elevation. Thorns formidable. Fruit deep 

 purple, as large as a hen's egg. 



15G. C. fragilis, JVutt. gen. i. p. 296. On the Platte 

 and Canadian, with the two following. Articulations easily 

 separating, oblong, tapering. 



157. C. mammillaris, L. JYutt. gen. i. p. 295. 



158. C. viviparus, JYuit. 1. c. 



159. C. Bleo, Humb. and Bonpl. 9 Kunth syn. iii. p. 

 372. ? C. cylindricus, James in Long's Exped. ii. p. 20. 



