Volume 9g December 9, 1913 
MUHLENBERGIA 
ADDITIONS TO THE FLORA OF SOUTH DAKOTA—II 
By STEPHEN SARGENT VISHER 
The following list of about one hundred and twenty species 
is part of a collection of over 460 made by me in Harding county 
in the extreme northwestern corner of the state for the state 
Geological and Biological Survey in July and August, 1910, 
June, 1911, and early August and early September, 1912. The 
determinations are all by Dr. Aven Nelson. After careful com- 
parison with Rydberg’s Flora of the Black Hills(1) and Saunders’ 
Catalog, 
are here first recorded from the state. The explanation for the 
as well as my earlier additions, it seeins that the 120 
addition of so large a number of species from so limited an area 
seems to lie partly in the fact that no botanical collection had 
previously been reported from that entire quarter of the state. 
Because of several forested buttes and river valleys, this county 
presents a considerable variety. 
MARSILIA MUCRONATA R. Br. ‘Four-leaved clover.” 
Very abundant in water holes, especially conspicuous after 
the holes go dry. 
(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. 
4. S. S. Visher. Additions. to the Flora of South Dakota—TI. 
Muhlenbergia 9: 45-52. 1913. 
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