184 ON THE GEOLOGY AND NATURAL HISTORY 
Argemone hispida, Gray. Bad Lands, White river, Loup fork, Fort Laramie. 
Sanguinaria Canadensis, Linn. Rich woods about Council bluffs. 
FUMARIACE. 
Corydalos aurea, Willd. Not seen on the bottoms to mountains. 
Dicentra cucullaria, D. C. In shady woods to mouth of Big Sioux. 
CRUCIFER. 
Nasturtium palustre, D.C. Not uncommon to mountains. 
Nasturtium obtusum, Nutt. On the Upper Missouri and Yellowstone. 
Nasturtium sinuatum, Nutt. Fort Clark, Upper Missouri. 
Nasturtium sesiliflorum, Nutt. Along Missouri. 
Nasturtium limosum, Nutt. Along low bottoms near to Council bluffs. 
Nasturtium calycinum,* Engelmann. N.sp. Annuum erectum seu diffusum, hir- 
sutulum; foliis caulinis anguste oblongis sinuatis seu subpinnatifidis basi au- 
riculata arcte sessilibus vel semi amplexicaulibus; racemis confertifloris demum 
elongatis; pedicellis flore flavido et silicula ovoidea acuta parva hispidula cum 
stylo gracilis vix longioribus; calyce persistente. In aspect as well as in the 
style (fully a line long on a silicle 12 line in length), this species resembles some 
Vesicariae, but the numerous seeds are those of a Nasturtium. 'The stem is about 
a foot high, often much branched and diffuse. The ovate lanceolate acutish 
sepals commonly persist until the valves of the pod have fallen. The pubescence 
of the pod consists of very short and pointed thick-based simple hairs. (A. Gray.) 
Sandy bottoms of the Yellowstone river; Fort Sarpy to Fort Union. 
Arabis Canadensis, Linn. Common along the Missouri to Fort Union. 
Arabis hirsuta, Scop. Fort Union and Bad Lands. 
Arabis laevigata, D. C. Shady woods to mouth of Platte. 
Arabis dentata, Torr. and Gray. Council bluffs. 
Sisymbrium canescens, Nutt. Fort Pierre and the Yellowstone. 
Dentaria laciniata, Muhl. Shady woods around Council bluffs. 
Erysimum asperum, D.C. Abundant on the high prairies to Fort Pierre and Fort 
Union. 
Erysimum cheiranthoides, Linn. Yellowstone and Bad Lands. 
Stanleya pinnatifida, Nutt. Abundant on the marl banks near Niobrara River, Fort 
Pierre, rarely on the Yellowstone. 
Stanleya integrifolia, James. Dr. Gray thinks it is a different form of last species. 
* First published in Preliminary Report of Explorations in Nebraska and Dakota, 1855, 6, and’7; Lieut. G. 
K. Warren, T. E. Catalogue of Plants. 
