174 Wyoming Experiment Station. 



Eriogonum ovalifolium, Nutt. Journ. Acad. Phila. vii, 50 (1834). 



In dry sandy soil on the plains ; frequent. 



Laramie, May 29, 1894 (No. 70); Hutton ranch, June 19, 1894 

 (No. 278). 

 Eriogonum subalpinum, Greene, Pitt, xiii, part 13, 18 (1896). 



This recently described species, founded, seemingly, on unimport- 

 ant characters I believe to be a valid one. The eight specimens 

 in our herbarium labelled E. timbellaiian fall readily into the 

 two groups made by Prof. Greene. At different times the writer 

 has brought in the two forms from the field fully convinced that 

 they were different and yet unable to separate them by any marked 

 botanical characters, though so readily distinguished in the field. 



Laramie Hills, July 7, 1894 (No. 346); Tetons, August 22, 1894 

 (No. 975); others from Laramie. 



Eriogonum umbellatum, Torr. -Ann. Lye. N. Y. ii, 241 (1828). 



Pole Creek, July 2, 1895 (No. 1419); Laramie Hills at various 

 times. 



Polygonum amphibium, L. Sp. PI. 361 (1753). 



Observed only in the Platte River near Fairbanks, but undoubt- 

 edly found elsewhere. July 15, 1894 (No. 551). 



Polygonum aviculare, L. Sp. PI. 362 (1753). 

 A common dooryard weed. 

 Laramie, September 24, 1894 (No. 1173). Goose Grass. 



Polygonum bistortoides, Pursh, Fl. i, 217 (1814). 

 Frequent in grassy valleys. 



Bald Mountain, August 15, 1892; Union Pass, August 11, 1894 

 (No. 1024). 

 Polygonum convolvulus, L. Sp. PL 364 (1753). 



Waste and cultivated ground ; Experiment Farm, September 15, 

 1894 (No. 1140); Popo Agie river, August 1, 1894 (No. 714). 



Polygonum Douglasii, Greene, Bull. Cal. Acad, iii, 125 (1885)- 



In dry ravines ; Sybille Creek, July 7, 1894 (No. 307); Laramie 

 Peak, August 7, 1895 (No. 1591). 



Polygonum erectum, L. Sp. PI. 363 (1753). 



Infrequent; on the bank of Blue Grass Creek, July 8, 1894 

 (No. 364). 



