512 



Droseraceae 



Drosera 



0" 50 



Map 1059 



Drosera rotundifolia L. 



50 



Map 1060 



Drosera intermedia Hayne 



scarce on account of drainage. My Delaware County specimen was obtained 

 from a bog on the Emerson McCullum farm about two and a half miles 

 southeast of Gaston. 



Lab. to the Canadian Rocky Mts., southw. to Fla., Ky., the Great Lakes, 

 and Iowa. 



112. DROSERACEAE S. F. Gray. Sundew Family 



3136. DROSERA L. Sundew 



Leaf blades suborbicular or wider than long 1. D. rotundifolia. 



Leaf blades 2-3 times as long as wide; stipules free; seed not appendaged, oblong 



2. D. intermedia. 



1. Drosera rotundifolia L. Roundleaf Sundew. Map 1059. Infre- 

 quent in tussocks of sphagnum moss in the open and in tamarack bogs ; very 

 rarely in moist sand with such species as Polygala cruciata, Gaultheria 

 promwibens, and Aletris farinosa. In 1915 it was so abundant on the 

 moist, sandy shore of Walker Lake, Porter County, that it covered acres, 

 and at a distance, the ground looked red. This and the next species are 

 restricted to the lake area. 



Lab. to Alaska, southw. to Fla. and Calif. 



2. Drosera intermedia Hayne. (Drosera longifolia of manuals, not L.) 

 Spatulate-leaf Sundew. Map 1060. Less frequent than the preceding 

 species and found in the open in moist, sandy soil among sedges or in 

 mossy places on the wet borders of lakes, and in sphagnum bogs. 



Newf. to Minn., southw. to Fla. and La. 



113. PODOSTEMACEAE Lindl. Riverweed Family 

 3156. PODOSTEMUM Michx. 

 See excluded species no. 278, p. 1054. 



