MR. GEYER’S ROCKY MOUNTAIN PLANTS. 253 
Has. Gravelly hills of Kanzas and Lower Platte Rivers with 
Euchroma grandiflora. May. (n. 252.) 
1. Tetradymia canescens, DC. in Deless. Ic. 4. t. 60. Hook. 
et Arn. Bot. Beech. Voy. Suppl. p. 360. wi se et Gr. Am. 
2. p. 447. 
Has. Clayey banks in the desert of Upper Colorado, with 
Artemisia cana and tridentata. August. (n. 63.) 
1. Arnica Chamissonis, Less.—Torr. et Gr. Am. 2. p. 449. A. 
montana, a. Hook. Fl. Bor. Am. 1. p. 330. 
Has. Scattered over the high fertile plains near Koos- 
kooskee River; not common. June.— I fear this is 
nothing more than one of the numerous varieties of A. 
montana, L, 
2. A. cordifolia, Hook. Fl. Bor. Am. 1. p. 331. Torr. et Gr. 
Am, 1. p. 450. 
Has. Light open pine-woods along the valley of Cœur > 
d'Aleine River, in warm protected situations, growing in 
Masses. April, May. (n. 309.) 
Trib Cynarez, Less. 
b ‘Cirsium undulatum, Nutt. (Carduus) Torr. et Gr. Am d 
_2. p.456. C. Douglasii, DC. | : 
Has. Fertile plains of the Lower Platte and Missouri rivers. ae 
, Jue. (n. 122.) 
C. Hookerianum, Nutt.—Torr. et Gr. m. 2. 
n discolor, Hook. Fl. Bor. Am. 1. p. 302, (in — 
; High plains, Upper Oregon and Missouri territory. 
June, ar e TM —1 fear too near the pues dee 
Trib. Crenonaces, Val 
