38 Muhlenbergia, Volume 9 
ONOSMODIUM OCCIDENTALE Mackenzie 
Plentiful on dry rocky soil; also in Washabaugh county. 
Included in 1894 in O. molle by Rydberg. 
MONARDA MENTHAEFOLIA Graham. Horsemint. 
Common along flood plains; also in Washabaugh and Hard- 
ing counties. “The same as IZ fistulosa mollis of western re- 
ports.” —Rydberg. 
SCROPHULARIA OCCIDENTALIS (Rydb.) Bicknell 
Tolerably frequent along creeks. .S. nodosa occidentalis 
was described by Rydberg in his Black Hills report. It was 
not mentioned by Saunders, however. 
ECHINOCYSTIS LOBATA (Michx.) T. & G. 
Common along Horsehead creek; also in Harding county; 
(eastern South Dakota). 
Artemisia tridentata. Sagebrush. 
Dominant on the higher terraces; also in Harding and 
Washington counties. 
Erigeron caespitosus Nutt. 
Common in the woods of the foothills. 
Grindelia perennis A. Nelson? Gum plant. 
Very numerous on uplands throughout, less common along 
valleys; also in Harding county. 
flelianthus Nuttall 'T. & G. Sunflower. 
Abundant on floodable portions of valleys, in willow groves, 
Etc: 
Helianthus subrhombotdeus Rydb. 
Rare along Indian creek. Rydberg believes the western 
sunflower previously included in and reported as H. scaberrimus 
is distinct. 
Solidago elongata Nutt. Golden rod. 
Rare on the prairies near Ardmore. 
Solidago nana Nutt. 
Plentiful on the plains. 
