First Report on the Flora of Wyoming. 143 



Tetradymia canescens inermis, Gray. 



While not separated from the species by any strong botanical 

 characters, yet readily distinguished by foliage and general habit. 

 Wallace Creek, July 29, 1894 (No. 656). 

 Cnicus altissimus filipendulus, Gray, Proc. Am. Acad, xix, 56. 



Specimens received from Sheridan Experiment Farm seem to 

 belong to this variety, probably introduced with farm seeds. Sep- 

 tember, 1895. 

 Onicus Americanus, Gray, Proc. Am. Acad, xix, 56. 



In the dry foothills near the Laramie River; not frequent. 

 Cummins, July 29. 1895 (No. 1512) 

 Cnicus arvensis, Hoffm. Deutch. Fl Ed. 2, 1: Part 2, 130 (1804). 

 Cardnus arvensis, (L.)Robs. 



Thus far this, the Canada Thistle, has been reported from only 

 one place in the state. 



Specimens from Sheridan, September 1895, J. F. Lewis. 

 Cnicus Drummondii, Gray, Proc. Am. Acad, x, 40. Cardinis pumilus. 

 Hook. 



Very frequent throughout the state. 



Laramie, September, 1893: Union Pass, August 14, 1894 (No. 

 881); Cummins, July 27, 1895 (No. 1469). 

 Cnicus lanceolatus, Hoffm. Cardnus lanceolatus, L. 



Becoming plentiful in vacant lots and along the irrigation ditches. 

 Cnicus ochrocentrus, Gray, Proc. Am. Acad, xix, 57 (1883). 

 In dry, open ground in the hills ; frequent. 



Laramie Hills, July 7, 1894 (No. 414); Gros Ventre River, 

 August 22, 189i (No. 1070). 

 Cnicus undulatus, Gray, Proc Am. Acad, x, 42 (1874). Cardnus 

 undutatus, Nutt. 



Frequent; Cheyenne, August 11, 1891, B. C. Buffum ; Laramie, 

 October 2, 1894 (No. 1156). 

 Cnicus Virginianus, Pursh, Fl. ii, 506 (1814). Cardnus Virginianus, L. 

 Very rare ; a few specimens irom a dry bank, Cummins, July 30, 

 1895 (No. 1563). 

 Crepis acuminata, Nutt. Trans, Am. Phil. See. vii, 437. 



On dry, sometimes stony ground, in the hills and mountains. 

 Laramie, July 7, 1894 (No. 356); Union Pass, August 10, 1894 

 (No. 919). 



