MR. GEYER'S ROCKY MOUNTAIN PLANTS. 223 
leaves are generally clothed with white appressed hairs. The 
bark is more glabrous, and never loosens, and peels off, as 
in the species just mentioned. The flowers scarcely droop 
before expansion : the upper portion of the calyx bursts on 
one side all the way, and the segments cohere at the point 
and bend back. I cannot point out any species to which 
it is particularly allied. 
8. Œ. albicaulis, Nutt.— Hook. Fl. Bor. Am, 1. p. 210. (not 
Ph.) Torr. et Gr. Am. 1. p. 495. 
Has. Sparingly scattered over the whole range of the deserts 
of Upper Missouri and Oregon territory: often 4 feet 
high, and very bushy. Corolla white. July. (n. 47.) 
9. CE. triloba, Nutt.—Sims, Bto. Mag. t. 2566. Torr. et Gr. 
Am, 1. p. 499. 
Has. Springy moory places on the high cold plains of the 
Nez Percez Indians, at Salmon river. Root fusiform, 
having the same taste as that of CE. biennis. June. (n. 
406.) 
10. CE. cespitosa, Nutt.—Sims, Bot. Mag. t. 1593. | 
Han. Clayey caleareous slopes of the argillaceous bitumi- 
nous slate-hills of Upper Platte. Flowers large, white, 
turning rose-coloured. Rare on the Platte, but abundant =—=— 
On the Missouri, along with * Astragalus galegoides.” (n. c ut 
160.)—The CE. montana of Nuttall seems almost to unite — 
T the CE. marginata of that author with CE. MEME 
A k lavandulafolia, Torr. et Gr. Am. 1. p. 501. 2 
MAB- Grows within a narrow limit near the junction of de = 
north and south fork of the Platte, on decomposed calca- _ 
. Teous rocks, with Phaca simplicifolia. Flowers the colour 
= of Carthamus tinctorius. (n. 16.)—A very distinct and rare 
e. but allied, as Messrs. Torrey and Gray justly 
M ^ eee ee eee o 
