78 MINNESOTA STUDIES IN PLANT SCIENCE 



Pl\te IV* 



I. Section Hydatica. capsule of 5". arguta; 1, petal; 2, sepal; 3, filament; 4, seed; 

 5, hair and its gland ; 6, leaf ; drawn from a specimen collected by S. G. Stokes in the 

 vicinity of Qayton Peak, Wasatch Mountains, Utah (MBG 84500). 



II. Immature capsule of S. aestivalis; 7, petal ; 8, sepal ; 9, filament ; 10, non-gland- 

 bearing hair; 11, seed; gl, gland; 11a, pistil, showing bottle-shaped form of young 

 carpels, typical of the section ; drawn from Piper's No. 2622, from Mount Rainier, 

 Washington (UMH). 



III. Mature capsule of S. Nelsoniana; 12, sepal ; 15, glands of hairs ; 14, seed ; 

 drawn from Jas. M. Macoun's No. 231, from Copper Islands, Bering Sea (USNH 

 249366). 



IV. Mature capsule of 5". unalaschensis ; IS, filament ; 16, petal ; 17, sepal ; 18, seed ; 

 drawn from a specimen collected by Trevor Kincaid on PopoflF Island, Alaska (USNH 

 375422). 



V. Mature capsule S. davurica; 19, sepal; 20, filament; 21, leaf; 22, seed; drawn 

 from a specimen collected by Chester Washburn, near Cape Sabine, Alaska (USNH 

 421209). 



VI. Mature capsule of S. Lyallii; 23, petal; 24, sepal; 25, filament; 26, hair and 

 gland ; 27, seed ; drawn from Butters and Holway's No. 818, from the Cougar Valley, 

 Selkirk Mountains, British Columbia (UMH). 



"The small numbers associated with figures of organs refer to the length in millimeters, 

 natural size. 



