OF THE UPPER MISSOURI. 
207 
Sarcobatus vermicularis , Nees. This is one of the most abundant shrubs on the Upper 
Missouri. It makes its first appearance near latitude 44°, and seems to thrive 
best in the saline clays of the Cretaceous and Tertiary formations. It is some¬ 
times called “ grease-wood” by the traders, and is often used for fuel by them on 
the Yellowstone river, where it grows to the height of ten or twelve feet, with 
trunks two to three inches in diameter. On the Yellowstone and along the 
Missouri, it sometimes covers many square miles to the exclusion of other plants. 
ScJioberia calceoliformis, Moq. Yellowstone. 
AMARANTHACEiE. 
Montelia tamariscina , Gray. Sandhills on Loup fork. 
AmarantJius albus , Linn. Sandy bottoms and shores of Missouri. 
AmarantJius retroflexns ? Linn. Bad lands. 
AmarantJius Jiybridus. Fort Union. 
AmarantJius blitum. Fort Union. 
FrcelicJiia Florid ana, Moq. Sandhills. 
POLYGONACEiE. 
Rumex cdtissimus , Wood. All along the Missouri to Bad Lands. 
Rumex maritimus, Linn. Along Missouri and Yellowstone. 
Rumex persicarioicles, Linn. Sandy bottoms of Missouri. 
Rumex venosus, Pursh. Old Ponca village, Loup fork. 
Polygonum ampliibium , Linn. Low wet places along the Missouri. 
Polygonum aviculare , Linn. Council bluffs, along the Missouri. 
Polygonum tenue , Michx. Council bluffs to mountains. 
Polygonum orientate, Linn. Council bluffs. 
Polygonum Pennsylvanicum, Linn. Bad Lands. 
Polygonum persicaria, Linn. Fort Sarpy on the Yellowstone. 
Polygonum ramosissimum, Michx. Bad Lands. 
Polygonum dumetorum, Linn. Council bluffs. 
Polygonum convolvulus , Linn. Black hills. 
Polygonum nodosum. Chardon’s creek in Blackfoot country. 
Eriogonum annuum , Nutt. Yellowstone and Bad Lands. 
Eriogonum flavum, Nutt. Bad Lands to Yellowstone. 
Eriogonum gnaphaloides, Benth. On arid hills, Fort Union, and Bad Lands. 
Eriogonum alatum , Torr. Fort Laramie. 
Eriogonum aureum. Shycnne river. 
Eriogonum umbellatum, Torr. Laramie mountains. 
Eriogonum ejfusum , Nutt. Platte valley. 
