FLORA OF THE BLACK HILLS OF SOUTH DAKOTA, 
By P. A. RYDBERG. 
ITINERARY. 
On May 26, at noon, I left Lincoln by the Burlington and Missouri 
River Railroad to spend three months in the Black Hills of South 
Dakota. A few days before, | had received a commission from the 
United States Department of Agriculture as an agent of the Division 
of Botany for the purpose of making an investigation of the flora of the 
Black Hills. Up to July 3, I was accompanied by Mr. A. E. Wagner, 
a graduate student of the University of Nebraska. In the morning of 
May 27 we arrived at Edgemont, where the railroad crosses the Chey- 
enne River. I availed myself of frequent opportunities to collect along 
the railroad track. Arriving at Custer, which point was taken as the 
base of operations, being about the center of the Hills, we remained 
there until June 7, collecting in all directions from 4 to 6 miles from 
town; but the number of plants in flower was not large. On July 7 
we moved our camp to an artificial body of water (Sylvan Lake) in the 
mountains not far from Harneys Peak. On June 10 we returned to 
Custer and took the train for Hot Springs, where we stayed, collecting, 
till June 21. Then taking the Fremont, Elkhorn, and Missouri Valley 
Railroad we followed the eastern foothills up to Elk River, stopping on 
the way at the following places: Buffalo Gap, June 21; Hermosa, June 
22 to 24; Rapid City, June 25 to 26; and Piedmont, June 27 to 29, 
On the morning of June 29 we bought tickets on the Black Hills and 
Fort Pierre Railroad to Runkels, but stepped off the train at Jones, mak- 
ing our way up the remaining length of the famous Elk Canyon on foot. 
We remained at Runkels through the next day, removing to Lead City 
the morning of July 1, at which point my camp remained till July 9. 
Mr. Wagner set out on his return to Lincoln July 3. From this base I 
visited the region around Deadwood, July 5; Whitewood, July 7; and 
Terrys Peak, July 8. On the 9th of July, 1 took the Burlington and 
Missouri River Railroad south, stopping at Rochford July 9 to 13, and 
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