188 ON THE GEOLOGY AND NATURAL HISTORY 
Negundo aceroides, Moench. One of the few trees which extend to the mountains. 
POLYGALACE. 
Polygala alba, Nutt. On sterile hills to Fort Union. 
Polygala verticillata, Linn. Moist places on prairies, Fort Pierre, Bad Lands. 
Polygala senega, Linn. Council bluffs. 
LEGUMINOSZ. 
Vicia Americana, Muhl. Upper Missouri generally. 
Lathyrus linearis, Nutt. Upper Missouri generally. 
Lathyrus polymorphus, Nutt. White river valley. 
Lathyrus venosus, Muhl. Rich bottoms, Big Sioux. 
Phaseolus pauciflorus, Benth. Bad Lands. _ 
Amphicarpea monoica, Nutt. White river valley, Fort Clark. 
Apios tuberosa, Moench. Along sandy woody bottoms of Missouri. A species of 
mouse gathers large numbers of the tubers of this plant for his winter store. 
These “ cachés” (as they are called) are eagerly sought by the squaws, and the 
tubers taken and used as food. I have seen several bushels of the roots in a 
single lodge. Cooked with buffalo meat they make a very palatable dish. 
Glycyrrhiza lepidota, Nutt. Diffused generally. 
Psoralea lanceolata, Pursh. From Bellevue to Yellowstone. 
Psoralea floribunda, Nutt. Big Sioux river to Bad Lands. 
Psoralea campestris, Nutt. Bad Lands. 
Psoralea argophylla, Pursh. A most beautiful plant, covering the plains as with sil- 
very velvet. Big Sioux to mountains. 
Psoralea cuspidata, Pursh. Fort Pierre to Bad Lands. 
Psoralea esculenta, Pursh. Affords the Indians a very nourishing farinaceous root, 
upon which they subsist almost entirely in the spring and early summer months, 
when game is scarce. It is also a great favorite of the grizzly bear. 
Psoralea digitata, Nutt. Sand hills on Loup fork. 
Amorpha fruticosa, Linn, A common shrub, above Missouri to mountains. 
Amorpha canescens, Nutt. Very abundant on the upland prairies, Loup fork, and 
Niobrara river. 
Amorpha nana, Nutt. Fort Laramie and high up the Missouri. 
Dalea aurea, Nutt. Bad Lands, 
Dalea alopecuroides, Willd, Big Sioux river, 
Dalea laxiflora, Pursh. Fort Pierre to the Yellowstone. 
Petalostemum candidum, Mich, Big Sioux river, 
Petalostemum multiflorum, Nutt. Fort Pierre to Bad Lands. 
