190 
ON THE GEOLOGY AND NATURAL HISTORY 
Crotalarici sagittalis, Michx. Big Sioux river. 
Lupinus pusillus, Pursh. Common on the Yellowstone. 
Lupinus ornatus , Douglass. Niobrara river, August 18th. 
Lupinus decumbens , Torr. Laramie mountains, August 24th. 
Tilia Americana , Linn. Abundant to Big Sioux; seen sparingly to mouth of Nio¬ 
brara, where it ceases. 
Lupinus perennis, Linn. Platte valley. 
Lupinus—? Bad Lands of the Judith. 
Thermopsis rhombifolia , Nutt. From Council bluffs to Fort Pierre ; Bad Lands, &c. 
Sophora sericea, Nutt. White river valley; Fort Pierre. 
Gleditschia tricanthus , Linn. Occurs as high on the Missouri as Big Sioux. 
Cercis Canadensis, Linn. Same as preceding. 
Cassia Chaemacrista, Linn. Sandy bottoms of Missouri, from Council bluffs to White 
river. 
Desmanthus brachylobus , Benth. Council bluffs and Platte valley; rich bottoms. 
Schranlcia uncinata, Willd. Gravelly hills on the Upper Missouri generally. 
Gymnocladus Canadensis, Lam. Abundant in woody bottoms to Big Sioux. 
Baptism leucophea , Nutt. Platte valley. 
Baptisia leucantlia , Torr. and Gray. Lower Platte river, June 25th. 
BOSACEiE. 
Pj ■units Americana, Marsh. Fort Pierre. 
Prunus pumila, Linn. Abundant in the sand hills of Loup fork; along Missouri 
river near Little Soldier’s camp. 
Prunus serotina , Ehrh. Council bluffs. 
Prunus Virginiana, Linn. Generally diffused. 
Millenia stipidcicea, Nutt. Mouth of Big Sioux. 
GiUenia trifoliata, Moench. Mouth of Big Sioux. 
Agrimonia eupatoria, Linn. Bellevue, N. T. 
Agrimonia parviflora, Ait. Around Fort Union. 
Spircea opulifolia var. pauciflora. Black hills, September 3d. 
Spirceci betulafolia var. cortjmbosa. “ “ 
Cercocarpus parvifolius, Michx. Laramie mountains, August 20th. 
Horhelia Gordoni. Laramie mountains. 
Cliaemorliodcts erecta, var. Nuttalli, Torr. and Gray. Big Bend and Yellowstone. 
Geum strictum , Ait. White river to Yellowstone. 
Geum album, Gmel. Fort Pierre and Mandan village. 
Geum triflorum , Pursh. Fort Union. 
