to the Rocky Mountains. 199 



Obs. I have not had an opportunity of consulting the 

 figure of Humboldt and Bonpland, quoted above from Kunth. 

 Our plant appears to differ in some respects from the C. fo- 

 thergilloides, which is described by De Candolle as having 

 elliptic, smooth, coriaceous leaves. 



salicarle. 



133. Ammannia ramosior, L. Tor.fi. i. p. 188. On the 

 Canadian ? 



Obs. Differs somewhat from the A. ramosior of the North- 

 ern States, in the leaves being almost auriculate at the base. 



134. Lythrum, n. sp. JVutt. mss. On the Missouri. Dr. 

 James and Dr. Baldwin. Found also in the Arkansa Terri- 

 tory, and near Detroit, by Mr. Nuttall. It much resembles 

 L. virgatum, but differs in being hexandrous. 



MELASTOMACE^. 



135. Rhexia virginica, L. Pursh Ji. i. p. 258. On 

 the Arkansa, near its junction with the Canadian. 



LOASE^. 



136. Mentzelia aurea, Nutt. gen. i. p. 300. Near the 

 Rocky Mountains. 



137. M. oligosperma, Nuit. mss. A decumbent species, 

 with large flowers. Sources of the Canadian. 



138. Bartonia ornata, Pursh Ji. i. p 327. Nutt. gen. i. 

 p. 297. On the sandy plains of the Canadian. In bud early 

 in July. 



139. B. nuda, Sims. Pursh ji. i. p. 328. Nutt. gen. 

 1. c. Sources of the Platte. In flower July 4th. 



Obs. The name of this genus should be changed, as the 

 Bartonia of Muhlenberg and Willdenow was published first. 

 Vol. II. 24 



