XXXII. A CONTRIBUTION TO THE KNOWLEDGE 
OF THE FLORA OF THE RED RIVER VALLEY 
IN MINNESOTA. 
W. A. WHEELER. 
During August, 1900, collections were made by the Botanical 
Survey in the valley of the Red River of the North. Professor 
Conway MacMillan, A. S. Skinner and C. J. Hibbard explored 
the region around Crookston through Polk and Red Lake 
counties and Professor C. A. Ballard visited Kittson, Marshall 
and Otter Tail counties. Professor MacMillan’s party visited 
Crookston, Shirley, Holmes station and the region around 
Maple lake near Dugdale and Mentor in Polk county and 
Thief River Falls, Red lake Falls, St. Hilaire, Wylie and Ives 
in Red Lake county. Professor Ballard visited St. Vincent, 
Humboldt, Northcote, Hallock and Kennedy in Kittson county, 
Marshall in Warren county and Fergus Falls in Otter Tail county. 
The collections made at these stations, scattered as they are 
through the Minnesota part of the Red River valley give a good 
representation of the late summer flora of this region. 
The following plants were gathered of which there have been 
no definite authentic collections previously reported from 
Minnesota. 
Puccinellia atroides (Nutt.) Wats. & Coutt. 
Elymus macount V ASEY. 
Scirpus campestris BRITTON. 
Juncus dudleyt WIEGAND. 
Peumex occidentalis S. Wats. 
Chenopodium ambrostoides L. 
Atriplex patula L. 
Potentilla effusa Dovucu. 
Chamerhodos erecta (L.) BUNGE. 
Lappula americana (A. GRAY) RYDBERG. 
Chrysopsts hispida (Hoox.) Nutr. 
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