190 Kansas Academy of Science. 



NOTES ON THE FLORA OF THE ROSEBUD INDIAN 

 RESERVATION, SOUTH DAKOTA. 



By Albert B. Reagan, Rosebud, S. Dak. 



'T^^HE Rosebud Indian reservation is situated in South Dakota, 

 -*- south of Big White river, and extends from about the middle 

 south line of the state east to the Rosebud lands opened for settle- 

 ment in 1904. It is bounded on the north by Big White river, on 

 the east by Gregory county (the land opened up for settlement), 

 on the south by Nebraska, and on the west by the Pine Ridge In- 

 dian reservation. The soil i^ sandy Loup Fork Tertiary, Miocene 

 clays or Cretaceous black shales as one proceeds northeast across 

 the reservation from its southwest corner. In the eastern part of 

 this area and in the valley regions the Minnesota and east Nebraska 

 flora prevails ; in the medium elevated regions, that of the high 

 plains ; and on the high points and in the western part of the 

 reservation, that of the Rocky Mountains. Many Canadian species 

 are also met with. The country in early spring to the middle of 

 the summer is a rose-flower region ; hence the name. Rosebud. The 

 Leguminosse are alsb prominent flowers, but, though more numer- 

 ous in species than the Rosacepe, are less conspicuous. In the sum- 

 mer the LeguminossB and the Evening Primrose family vie with 

 each other. The predominating flowers of the fall season are those 

 of the Compositse. The grass family is represented by numerous 

 species, which are themselves very variable. The trees are usually 

 low and spreading, and are usually found only along the streams. 



The following list of identified plants are the result of the author's 

 observations during the spring, summer and fall of 1904. The 

 work was carried on as time would permit, and, consequently, con- 

 tains only a small part of the plants of the region. 



The books used in identifying the plants were Wood's "Eastern 

 Botany," Bessey's "Botany for High Schools and Colleges," Gray's 

 "Lessons and Manual of Botany," and Coulter's "Manual of Rocky 

 Mountain Botany." 



The date in parentheses is that on which the first bloom of that 



respective plant appeared. 



Ranunculaceae : 



Anemone carolinana Walt. 



Numerous. 

 Delphinium azureum Michx. Larkspur. 



Common. 



