206 
ON THE GEOLOGY AND NATURAL HISTORY 
Acer ales Ion ej [folia, Nutt. Common around Fort Pierre. 
Acer cites angustifolia, Nutt. With preceding. 
Acerates viridiflora, Ell. Dwarfed. Loup fork, July 27th. 
QLEACEaE. 
Fraxinus Americana, Linn. Generally diffused throughout the Northwest. 
ARISTOLOCHIACEE. 
Ascirum Canadense, Linn. Near Council bluffs. 
NY CTAG IN ACEaE. 
Oxybaphus nyctagineus, Sweet. Fort Pierre, &c. 
Oxybaphus floribundus, Choisy. Fort Clark. 
Oxybaphus hirsutus, Sweet. Yellowstone. 
Oxybaphus angustifolius, Sweet, and var. decmnhens. Fort Pierre to Yellowstone. 
Abronia frag vans, Nutt. Yellowstone. 
Abronia cycloptera. Gray. Yellowstone. 
CHENOPODIACEaE. 
Chenopodium album, Linn. Common all along the Missouri. 
Chenopodium glaucum, Linn. Along the Yellowstone. 
CJienopodium ambrosioides, Linn. Mouth of Milk river. 
Chenopodiuni urbicum, Linn. Big Muddy, Fort Union. 
Atriplex liastata, Linn. Little Pocky Mountain creek. 
Cycloloma platyphyllum, Moquin. Laramie mountains, August 24th. 
Monolepis Nuttalliana, Moquin. Fort Union. 
Monolepis chenopodioides, Moquin. Below Fort Pierre, along Missouri and Yellow¬ 
stone to Fort Sarpy. 
Obione speciosa, Moquin. Bad Lands to Yellowstone. 
Obione canescens, Moquin. Throughout the Missouri and Yellowstone region. 
Obione argentea, Moquin. Abundant on arid hills near mouth of Yellowstone. 
Obione Suckleyana, Torr (in Stevens’s Report, P. R. Surveys, in ed. fig. 3), Fort 
Union 
Eurotia lanata, Moq. Bad Lands to Yellowstone, Fort Laramie. 
Kochia clioica, Nutt. Fort Pierre to Yellowstone. 
Corispermum. hyssop folium, Linn. Yellowstone ; hairy variety on sandbars along 
Missouri, Fort Union, August 15th. 
Suceda furticosa, Forsh. Saline places on Yellowstone. 
Suasda maritima, Dumort. Milk river. 
Chenopodina depressa, Moq. Saline places, Yellowstone. 
Salicornia herbacea, Linn. Saline places, Fort Union. 
