204 



DROSERACEAE. 



VOL. II. 



3. Drosera longifolia L. Oblong-leaved Sun- 

 dew. Fig. 2127. 



Drosera longifolia L. Sp. PI. 282. 1753. 



Drosera anglica Huds. Fl. Angl. Ed. 2, 135. 1778. 



Similar to the preceding species, but the leaf-blade is 

 erect, longer (8"-is" long, i$"-2" wide), elongated- 

 spatulate and narrowed into a glabrous or sparingly 

 hairy petiole I '-4' long; pedicels "-3" long; flowers 

 usually several, racemose, white, 2"-2$" broad, rarely 

 only one; seeds oblong, obtuse at both ends, the testa 

 loose. 



In bogs, Newfoundland and arctic America to Manitoba 

 and British Columbia, Ontario, Michigan, Idaho and Cali- 

 fornia. Also in northern Europe and Asia. Summer. 



4. Drosera linearis Goldie. Slender-leaved Sundew. 

 Fig. 2128. 



Drosera linearis Goldie, Edinb. Phil. Journ. 6: 325. 1822. 



Scape low but sometimes exceeding the leaves, glabrous. 

 Petioles erect, glabrous, 2'~4' long; blade linear, '-3' long, 

 about i" wide, densely clothed with glandular hairs, obtuse 

 at the apex; flowers few, or solitary, white; petals somewhat 

 exceeding the sepals; seeds oblong, black, the testa close, 

 smooth and somewhat shining. 



In bogs, Quebec to Ontario, Alberta, Maine, Wisconsin and 

 Minnesota. Blooms a little later than D. rotundifolia when the 

 two grow together. 



5. Drosera filiformis Raf. Thread-leaved Sundew. Fig. 2129. 



Drosera filiformis Raf. Med. Rep. (II.) 5 : 360. 1808. 

 Drosera tenuifolia Willd. Enum. 340. 1809. 



Scape erect, glabrous, 8'-2o' high. Leaves narrowly lin- 

 ear or filiform, glandular-pubescent throughout, 6'-is' long, 

 about i" wide, usually acutish at the apex, with no distinc- 

 tion between blade and petiole, woolly with brown hairs at 

 the very base; racemes i-sided, io-3O-flowered ; pedicels 

 2"-4" long; flowers purple, 4"-i2" broad; petals obovate, 

 much exceeding the sepals; seeds fusiform, acute at each 

 end, the testa minutely punctate. 



In wet sand, near the coast, eastern Massachusetts to Flor- 

 ida and Mississippi. July-Sept. Eariest leaves short, lanceo- 

 late, acute, the apex glandular. A hybrid with D. intermedia 

 is described. 



Drosera brevifolia Pursh, a species of the southeastern 

 United States, with cuneate-obovate leaves and glandular- 

 pubescent scapes, enters our territory in extreme southeastern 

 Virginia. 



