186 ON THE GEOLOGY AND NATURAL HISTORY 
Cerastium arvense, Linn. Council bluffs. 
Moehringia lateriflora, Linn. Along Missouri to Council bluffs. 
Paronychia sessiliflora, Nutt. Fort Union, Laramie peak, Black hills. 
Stellaria longipes, Goldie. Council bluffs. 
Arenaria Franklini, Douglass. Laramie mountains, August 24th. 
Paronychia sessiliflora, Nutt. Elkhorn prairie, Bad Lands of the Judith, Blackfoot 
country, August 22d. 
Paronychia Jamesii, Torr. Black hills, September 15th. 
PORTULACACE. 
Portulaca oleracea, Linn. On saline clay soil, Teton river, near Fort Pierre; also 
near base of Black hills (indigenous). . 
Claytonia Virginica, Linn. Rocky woods, as high up the Missouri as Council bluffs. 
ulinum parviflorum, Nutt. Sand hills on Loup fork. 
MALVACEZ. 
Abutilon Avicennae, Gaertn. Naturalized near Council bluffs. 
Malvastrum coccinewm, Gray. Makes its appearance on the Missouri about latitude 
43°, and continues to the mountains. 
Callirhoe macrorhiza, Gray. Loup fork, July 22d. 
Callirhoe involucrata, Gray. Platte river. 
TILIACE. 
Tia Americana, Linn. Abundant to Big Sioux; seen sparingly to mouth of Nio- 
brara river, where it ceases. 
LINACEZ. 
Linum rigidum, Pursh. Throughout the prairie portion of the Upper Missouri. 
Linum perenne, Linn. Fort Pierre and Fort Union. 
Linum Bootti, Planchon. Found by Dr. Cooper in Kansas. 
GERANIACE. 
Geranium caespitosum, James. Black hills and Laramie mountains. 
Geranium maculatum, Linn. Common to Niobrara. 
Geranium Carolinianum, Linn. Mouth of Big Sioux. 
OXALIDACE. 
Oxalis stricta, Linn. Generally diffused. 
Oxalis violacea, Linn. Rich prairies and cultivated fields around Council bluffs ; seen 
nearly as high as Niobrara in full bloom, June 20th, 1857. 
Oxalis corniculata, Linn. Upper Missouri. 
BALSAMINACEZE. 
Impatiens pallida, Nutt. Shady woods to mountains. 
Impatiens fulva, Nutt. Council bluffs and Big Sioux. 
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