% MINNESOTA STUDIES IN PLANT SCIENCE 



Plate XIII 



I. Follicles of 5". winnehagoensis; II, ventral ; III, dorsal views of a mature 

 follicle; 1, sepals; 2, a filament; 3, seeds; 4, glands of hairs; drawn from W. A. 

 Wheeler's No. 180, from the Winnebago Valley, Minnesota (UMH). 



IV. A flower of 5". oregana; V, follicles; VI, ventral view of a mature follicle; 

 VII and VIII, very young carpels ; 5, petals ; 6, sepals ; 7, a stamen ; 8, seeds (drawn 

 to different scales) ; 9, bract of inflorescence; 10, glands of hairs; drawn from Thomas 

 Howell's No. 1498, from Lake Labish, Oregon (UMH). 



IX. Follicles of S. Sierrae; X, dorsal ; XI, ventral views of mature follicles ; Xll, 

 young carpels showing gland; 11, petals; 12, sepals; 13, filament; 14, seeds; IS, glands 

 of hairs ; drawn from Mrs. R. M. Austin's No. 83, from Colby, Butte County, Cali- 

 fornia (UMH). 



XIII. Advanced stage of pistil ; XIV, ventral view of carpel ; 16, petals ; 17, a 

 sepal; 18, glands of hairs; drawn from a specimen of Baker's type collection of 5. 

 arnoglossa, from Marshall Pass, Colorado (UMH); 19, a petal; 20, a sepal; from 

 Baker's No. 4635; 21, two seeds; drawn from a specimen of S, arnoglossa; from 

 Kenneth D. Mackenzie's No. 222, Colorado (MBG 83876). 



