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. 
OLEACEiE. 
Fraxinus Americana, Linn. Generally diffused throughout the Northwest. 
ARISTOLOCHI ACEiE. 
Asarum Canadense, Linn. Near Council bluffs. 
NYCTAGINACEiE. 
Oxybaphus nyctagineus, Sweet. Fort Pierre, See. 
OxybapJmsfloribundus, Choisy. Fort Clark. 
Oxybaphus hirsuties, Sweet. Yellowstone. 
Oxybaphus angustifolius , Sweet, and var. decumbens . Fort Pierre to Yellowstone. 
Abronia fragrans, Nutt. Yellowstone. 
Abronia cycloptera, Gray. Yellowstone. 
CHENOPODIACE^E. ' 
Chenopodium album , Linn. Common all along the Missouri. 
Chenopodium glaueum, Linn. Along the. Yellow stone. 
Chenopodium ambrosioides, Linn. Mouth of Milk river. 
Chenopodium urbicum, Linn. Big Muddy, Fort Union. 
Atriplex hastata, 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 Suekleyana, Torr (in Stevens’s Report, P. B. Surveys, in ed. fig. 3), Fort 
Union 
Eurotia lanata, Moq. Bad Lands to Yellowstone, Fort Laramie. 
Kochia dioica, Nutt. Fort Pierre to Yellowstone. 
Corispermum hyssopifolium, Linn. Yellowstone; hairy variety on sandbars along 
Missouri, Fort Union, August 15th. 
Sucedd furtlcosa, Forsh. Saline places on Yellowstone. 
Suceda maritima, Dumort. Milk river. 
Chenopodina depressa, Moq. Saline places, Yellowstone. 
Salicornia herbacea, Linn. Saline places, Fort Union. 
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Botanical 
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