OF THE UPPER MISSOURI. 
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Liatris scariosa , Willd. Western prairies, abundant. 
Pedis angustifolia , Torr. North Platte. 
Brickelia grandiflora, Nutt. Laramie mountains, August 24th. 
Machcerqnthera tanacetifolia, Nees. On Powder river, Yellowstone, and Bad Lands 
of the Judith. 
Machceranthera canesceiis, Gray. (Aster canescens , Pursh.) Along the Missouri, at 
the mouth of the Big Shyenne, at Fort Clark, &c. 
Machcer anther a viscosa (Dideria viscosa, Nutt.). Common in prairie dog villages on 
the Yellowstone river; only the lowest leaves are sharply and divaricately toothed, 
all others are linear and entire; the plant is annual or biennial, six to ten inches 
high, divaricately branched, the heads much smaller than in the foregoing species. 
Aster cordifolius , Linn. Not uncommon, Big Sioux and Niobrara. 
Aster saggitifolius , Willd. Big Sioux and Niobrara. 
Aster azureus, Lindl. Council bluffs. 
Aster multiflorus, Ait. Council bluffs. . 
Aster sericeus, Vent. Fort Pierre. 
Aster Novce-Anglice , Ait. Low places on Missouri. 
Aster Icevis , Linn. Upper Missouri. 
Aster ptarmicoides, Nees. Black hills. 
Aster angustus , Torr. & Gray. Bad Lands of Judith. 
Aster paucifbrus , Nutt. Near Fort Union, September. 
Aster simplex , Willd. Shyenne river, September 3d. 
Aster glacialis , Nutt. Laramie mountains, August 24th. , 
Tawnsendia grandiflora , Nutt. Eagle Nest butte, White river. 
Erigeron pumilum , Nutt. High hills around Fort Pierre. 
Erigeron strigosum , Muhl. Low places, Vermilion prairie. 
Erigeron Philadelphiaum , Linn. Alluvial bottoms of Missouri. 
Erigeron Ganadense , Linn. Common all over Missouri country. 
Erigeron compositum , Pursh. Sterile hills at Fort Union, without flower or fruit. 
Erigeron glabellum , Nutt. Prairies around Fort Pierre and the Yellowstone. 
Erigeron bellidiastrum , Nutt. Niobrara river, August 12th. 
Erigeron macranthum , Nutt. Black hills, September 10th. 
^Aplopappus Nuttalli, Torr. and Gray. Bad Lands. 
Aplopappus lanceolatus. Fort Union. 
Aplopappus spinulosas , D. C. High prairies of the Upper Missouri. 
Boltonia glastifolia , L’Her. Bellevue, N. T. 
**Gutiernezia Euthamiae , Torr. and Gray. Yellowstone country; also Black hills. A 
smoothish and a scabrous form. 
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