206 ON THE GEOLOGY AND NATURAL HISTORY 
Acerates longifolia, Nutt. Common around Fort Pierre. 
Acerates angustifolia, Nutt. With preceding. 
Acerates viridiflora, Ell. Dwarfed. Loup fork, July 27th. 
OLEACE. 
Fraxinus Americana, Linn. Generally diffused throughout the Northwest. 
ARISTOLOCHIACE®. 
Asarum Canadense, Linn. Near Council bluffs, 
NYCTAGINACEZ. 
Oxybaphus nyctagineus, Sweet. Fort Pierre, &c. 
Oxybaphus floribundus, Choisy. Fort Clark. 
Oxybaphus hirsutus, Sweet. Yellowstone. 
Oxybaphus angustifolius, Sweet, and var. decumbens. Fort Pierre to Yellowstone. 
Abronia fragrans, Nutt. Yellowstone. 
Abronia cycloptera, Gray. Yellowstone. 
CHENOPODIACE®. 
Chenopodium album, Linn. Common all along the Missouri. 
Chenopodium glaucum, Linn. Along the Yellowstone. 
Chenopodium ambrosioides, Linn. Mouth of Milk river. 
Chenopodium urbicum, Linn. Big Muddy, Fort Union. 
Atriplex hastata, Linn. Little Rocky 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 
Lurotia lanata, Mog. Bad Lands to Yellowstone, Fort Laramie, 
Kochia dioica, Nutt. Fort Pierre to Yellowstone, 
Corispermum hyssopifolium, Linn. Yellowstone ; hairy variety on sandbars alone 
Missouri, Fort Union, August 15th, ; 
- Sueda furticosa, Forsh. Saline places on Yellowstone. 
Sueda maritima, Dumort. Milk river, . 
Chenopodina depressa, Mog. Saline places, Yellowstone. 
Salicornia herbacea, Linn. Saline places, Fort Union, 
