190 
ON THE GEOLOGY AND NATURAL HISTORY 
Orotalaria 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 rhombifoiia , 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. 
Desmanihus 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. 
ROSACEiE. 
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 bluffs. 
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. 
Spircea opxdifolia var. pauciflora. Black hills, September 3d. 
Spircea betulafolia var. corymbosa. u “ 
Cercocarpus parvifolius, Michx. Laramie mountains, August 20th. 
Horkelia Gordoni . Laramie mountains. 
Chaemorhodas erecta , var. Nuttalli, Torr. and Gray. Big Bend and Yellowstone. 
Geum strict am, Ait. White river to Yellowstone. 
Geum-.album, Gmel. Fort Pierre and Mandan village. 
Geum triflorum , Pursh. Fort Union. 
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Botanical 
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