OF THE UPPER MISSOURI. 209 
PLATANACE. 
Platanus occidentalis, Linn. Abundant on the rich bottoms of Missouri and Kansas; 
but ceases to appear about one hundred miles above Council bluffs. 
JUGLANDACE. 
Juglans cinera, Linn. Big Sioux. 
Juglans nigra, Linn. Does not extend above latitude 43°. 
CUPULIFERZ. 
Quercus tinctoria, Bartram. Council bluffs and Big Sioux. 
Quercus rubra, Linn. With preceding. 
Quercus macrocarpa, Michx. Extends to mountains. 
Quercus obtusiloba, Michx. Bad lands. 
Corylus Americana, Walt. Abundant around Council bluffs. 
BETULACEZ:. : 
Betula glandulosa, Michx. Laramie mountains, August 26th. 
Alnus 2? Black hills. 
SALICACEZ. 
Salix longifolia, Muhl. In different forms along Missouri and Yellowstone. 
Salix nigra, Marshall. Council bluffs. 
Salia ? Fort Pierre. 
Salia 2? Forks of White river. 
Salia 2 Fort Pierre, June 18th. 
Salix 2? Medicine creek. 
Populus tremuloides, Michx. Black hills. 
Populus monilifera, Ait. A large tree, constituting by far the greater portion of the 
timber along the valley of the Missouri. 
Populus Called in the West “bitter Cottonwood.” Makes its first appear- 
ance near Fort Laramie. Have never observed it along the Missouri. A few 
small trees observed near the head of the Shyenne, at the base of Bear Peak. 
CONIFER. 
Pinus Engelmanni, Torr. On the Yellowstone. 
Pinus ponderosa, Douglass. Black hills. 
Abies Douglassi. Bad lands of the Judith. 
Juniperus Virginiana, Linn. Along Missouri to mountains. 
Juniperus communis, Linn. Fort Union. 
VOL. XII.—27 
