100 MINNESOTA STUDIES IN PLANT SCIENCE 



Plate XV 



S. nidifica: I and II, two flowers of the same collection of "S. plantaginea" 

 Small ; 1 and 3, petals and sepals of I ; 2 and 4, the same of II ; drawn from the type 

 collection of Sandberg and Leiberg, from Spokane, Washington, May, 1893; 5, varia- 

 tions in petals of different flowers of the same plant; drawn from a specimen of a 

 collection furnished by Mr. Alonzo P. Troth, of the Lewis and Clark High School, 

 Spokane, Washington; III and IV, two different types of mature follicles in Piper's 

 S. Columbiana; V, dorsal view of a single follicle of III; 6, two petals of same; 7 

 and 8, mature and immature seeds ; 9, glands of hairs ; VI, a flower showing both 

 narrow and broad petals in the same flower (compare with I and II) ; drawn from 

 Piper's No. 1808, from Pullman, Washington; VII, a flower of Suksdorf's 5". brac- 

 teosa; VIII, dorsal; IX, ventral views of mature follicles of same (compare with III, 

 IV, V); 10, seeds; 11, glands of hairs of same; drawn from Suksdorf's No. 1728, 

 from the Columbia River, southwestern Washington (UMH) ; X, a flower of Suks- 

 dorf's No. 4014, S. bracteosa var. leptopetala, from West Klickitat County, Washington 

 (UMH) ; XI, a young carpel from a flower of I, showing prominent verrucose gland. 



