372 CATALOGUE OF MR. GEYER'S PLANTS 
Has. Banks of streams, Missouri territory, on the Lower Platte, and 
within the “Black Hills.” 60-80 feet high. Branches declined. 
n. 281. 
2. Salix pentandra, L. 
Has. Borders of rivulets and around springs, Missouri and Oregon 
territories. 15-20 feet high, forming often impenetrable thickets. 
n. 287.—The specimens are young, and appear quite to agree with 
the European S. pentandra rather than with S. lucida of Pursh and 
Willdenow, if indeed the two be really distinct. 
— 3. Salix rostrata, Richard's App. to Frankl. Journ. p. 37. (Exel. syn. 
S. phylicifolie.)\—Hook. Fl. Bor. Am. vol. ii. p. 147. 
Has. Borders of streams and rivulets, most abundant about springs. 
10-15 feet high. x. 286. 
E Salix grisea? ; ramis strictis rufo-brunneis, junioribus pubescente- 
canis, folis li-uncialibus brevissime petiolatis obovato-Janceolatis 
aeutis supra subpubescentibus subter glabris glaucis margine ciliatis, 
amentis ante folia oblongis, squamis longe sericeis, ovario stipitato 
lanceolato arcte sericeo squamis duplo longiore, stylo glabro fureato 
ramis furcatis. 
Has. Thickets along rivulets, Columbia River Valley, near Fort Col- 
= ville. 20 feet high. Shrubby. 2. 636. 
2 d Populus angustifolia, James, in Long Exped. vol. i. p. 497.— Torr. 
in James’ Rocky Mountain PI. 
Has. Banks of streams, Missouri territory, on the Lower Platte, and 
within the “ Black Hills.” n. 281.— Tree 60-80 feet high ; branches 
— alittle declined.—* This is the Narrow-leaved Cotton-wood of Lewis 
and Clark, who detected it at the sources of La Platte, mixed indeed 
with the common Cotton-wood, which it resembles in size and habit, 
but its trunk is smoother, and its branches more slender and flexile ; 
and the leaves are very different." 
1. Alnus rubra, Bong. Veget. Sitka, p. 44. — Hook. Fl. Bor. Am. 
vol. ii. p. 158. 
AB. Banks of streams, Upper Oregon, Clarke's River. September. 
hrub, 10-12 feet high. n. 215. 
CUPULIFERÆ, PS 
Corylus Americana, Wahl.—Hook. Fl. Bor. Am. vol. ii. p. 160. 
-w of Upper Columbia, forming thickets. 2. 635. 
