OF THE UPPER MISSOURI. 
209 
PLATAN ACEiE: 
Platanus occidentalism Linn. Abundant on the rich bottoms of Missouri and Kansas ; 
but ceases to appear about one hundred miles above Council bluffs. 
JU GLAND ACE AE. 
Juglans cinera, Linn. Big Sioux. 
Juglans nigra , Linn. Does not extend above latitude 43°. 
CUPULIFEILE. 
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. 
BETULACErE. 
Betula glandulosa, Michx. Laramie mountains, August 26th. 
Alnus - ? Black hills. 
SALICACEAE. 
Salk c longifolia, Muhl. In different forms along Missouri and Y ello wstone. 
Salix nigra, Marshall. Council bluffs. 
tSalix - ? Fort Pierre. 
Salix - ? Forks of White river. 
Salix - ? Fort Pierre, June 18th. 
Salix - ? Medicine creek. 
Popnlus 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 “hitter 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. 
CONIFE1LK. 
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.— 2T 
