Volume 9 May 10, 1913 
MUHLENBERGIA 
ADDITIONS TO THE FLORA OF SOUTH DAKOTA—I 
By STEPHEN SARGENT VISHER 
The following list of ninety odd species is a part of a col- 
lection of about 400 species made by me for the South Dakota 
Geological and Biological Survey in July and August, IgII. 
The determinations are by Dr. P. A. Rydberg. After compari- 
son with the published reports (1) dealing with the flora of 
South Dakota, it appears that the following are first records for 
the state. The county names in parentheses are those from 
which Dr. Rydberg examined specimens. They are located in 
the southwestern part of the state. The synonyms are my ad 
ditions. Neither the bad lands nor the sand hills of South Da- 
kota had been botanically explored before, which is an explana- 
tion of the large number of species added to the flora. 
EQUISELUM HYEMALE lL Scouring rush, pipe stem. 
Occasional along valleys; (Washabaugh county). 
EQUISETUM ROBUSTUM A. Br. 
Occasional along streams, especially in the sand _ hills; 
(Washabaugh county). 
EQUISETUM VARIEGATUM Schleich. 
Common along stream banks throughout; (Washabaugh 
county). 
(1) 1. P. A. Rydberg. Flora of the Black Hills. Cont. U. 
S. Nat. Herb. 3: 463-536. 1896. 
2. D. A. Saunders. Flora of South Dakota. Bulletin 64, 
South Dakota Experiment Station, Brookings, 1899. 
3. S. S. Visher. Additions to the Flora of the Black Hills. 
I. Torreya 9: 186-188. 1909; II. Muhlenbergia 8: 135-137. 1913; 
III. Muhlenbergia 9: 33-39. 1913. 
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