Allen.] 82 [JuneS, 



CHENOPODIACE^!, 



167. Obione argentea Moq. Abundant in the bad lands of 

 the Yellowstone and Musselshell. 



168. Obione canescens Moq. Fort Rice (June 15th), and 

 thence increasing in abundance westward to the Musselshell. 



169. Obione confertifolia Torr. Yellowstone, above Tongue 

 River, August 6th. 



170. Endolepis Suckleyi Torr. Yellowstone Valley, and 

 westward. Common. 



171. Monolepis Nuttalliana Moq. Fort Rice, June 13th. 



172. Suceda diffusa S. Wat. Valley of Yellowstone. Com- 

 mon. 



173. Eurotia lanata Moq. Crossing of the Big Muddy, 

 June 30th. 



POLYGONACE^E. 



174. Eumex salicifolius Weinm. Crossing of the Big 

 Muddy, June 28th. Frequent along the smaller streams. 



175. Polygonum amphibium Linn. Head of Davis Creek, 

 July 9th. Streams, common. 



176. Polygonum aviculare Linn. Valley of the .Yellow- 

 stone, near the mouth of Big Horn River, August 11th. 



177. Polygonum ramosissimum Michx. Bad lands of the 

 Yellowstone, August 11th. 



178. Eriogonum annuum Nutt. Shell Point, Yellowstone 

 River, July 21st. 



179. Eriogonum cernuum Nutt. Shell Point, Yellowstone 

 River, July 21st. 



180. Eriogonum brevicaule Nutt. Valley of the Yellow- 

 stone, near the mouth of the Big Horn, August 1 2th. 



181. Eriogonum flavum Nutt. Prairies, forty miles west of 

 Fort Rice, June 2 2d. 



182. Eriogonum multiceps Nees. Andrew's Creek, July 

 10th; head of Davis Creek, July 12th. 



EL^AGNACEtE. 



183. Shepherdia argentea Nutt. Abundant along the 

 Missouri at Fort Rice, and common on Heart River and on the Yel- 

 lowstone. Very abundant in the valley of the Musselshell, and 

 loaded with fruit — the only place where it was seen with fruit. 



