190 ON THE GEOLOGY AND NATURAL HISTORY 
Crotalaria 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. 3 
Desmanthus brachylobus, Benth. Council bluffs and Platte valley ; rich bottoms. 
Schrankia uncinata, Willd. Gravelly hills on the Upper Missouri generally. 
Gymnocladus Canadensis, Lam. Abundant in woody bottoms to Big Sioux. 
Baptisia leucophea, Nutt. Platte valley. 
Baptisia leucantha, Torr. and Gray. Lower Platte river, June 25th. 
ROSACEZ. 
Prunus 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 blufts. 
Prunus Virginiana, Linn. Generally diffused. 
Gillenia stipulacea, Nutt. Mouth of Big Sioux. 
Gillenia trifoliata, Moench. Mouth of Big Sioux. 
Agrimonia eupatoria, Linn. Bellevue, N. T. 
Agrimonia parviflora, Ait. Around Fort Union. 
Spirea opulifolia var. pauciflora. Black hills, September 3d. 
Spireea betulafolia var. corymbosa. s ee 
Cercocarpus parvifolius, Michx. Laramie mountains, August 20th. 
Horkelia Gordoni. Laramie mountains. 
Chaemorhodas 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. 
Gewm triflorwm, Pursh. Fort Union. 
