Vol.. II.] 



SUNDEW FAMILY. 



161 



i. DROSERA L. Sp. PI. 281. 1753. 



Bog herbs, with basal leaves clothed with glandular hairs which secrete a fluid that entraps 

 insects, and scapose racemose flowers. Calyx-tube short, free from the ovary, very deeply 4- 

 8-parted (commonly 5-parted). Petals usually 5, spatulate. Stamens as many as the petals: 

 anthers short, extrorse. Ovary i-celled; styles 2-5, usually 3, distinct or united at the base, 

 often deeply 2-parted so as to appear twice as many, or fimbriate. Capsule 3-valved 

 (rarely 5-valved), many -seeded, generally stipitate in the calyx. [Name from the Greek, 

 dew, in allusion to the dew-like drops exuded by the glands of the leaves.] 



About 1 10 species, most abundant in Australia. Besides the following, 2 others occur in the 

 southeastern States. Otir species are known as Sundew, or Dew-plant. 



i. D. rotundifolia. 



2. D. intermedia. 



3. D. longifolia. 



4. D. linearis. 



5. D.filiformis. 



Blade of the leaf orbicular, or wider than long; petals white. 

 Blade of the leaf linear, or longer than wide. 



Leaves linear or spatulate with a distinct petiole; petals white. 

 Blade of the leaf spatulate. 



Blade 2-3 times as long as wide. 

 Blade 6-8 times as long as wide. 

 Blade linear, 10-15 times as long as wide. 

 Leaves filiform, much elongated, with no distinct petiole; petals purple. 



i. Drosera rotundifolia L. Round-leaved Sundew 

 or Dew-plant . ( Fig . 1 803 . ) 



Drosera rotundifolia L- Sp. PI. 281. 1753. 



Scape slender, erect, glabrous, 4 / -io / high. Leaves orbicular 

 or broader, spreading on the ground, the blade 3 // -6 // long, 

 abruptly narrowed into a flat pubescent petiole ^'-2' long, the 

 upper surface covered with slender glandular hairs; raceme i- 

 sided, simple or sometimes once forked, 4-i2-flowered; pedi- 

 cels i "-a" long; flowers white, about -2" broad, opening in 

 sunshine; petals oblong, somewhat exceeding the sepals; seeds 

 fusiform, pointed at both ends, the testa loose. 



In bogs or wet sand, Labrador to Alaska, south to Florida and 

 Alabama, and in the Sierra Nevada to California. Ascends to 2500 

 ft. in the Catskills. Also in Europe and Asia. Rootstock usually 

 short. Called also Rosa-solis, Youth-wort. July-Aug. 



2. Drosera intermedia Hayne. Spattilate-leaved Sundew. (Fig. 1804.) 







Drosera intermedia Hayne in Schrad. Journ. Bot 1800: Part i, 37. 



Drosera longifolia Michx. Fl. Bor. Am. i: 186. 1803. Not L 

 1753- 



Drosera Americana Willd. Knum. 340. 1809. 



Drosera intermedia var. Americana DC. Prodr. i: 318. 1824. 



Rootstock elongated (2 / -4 / long when growing in water). 

 Scape erect, glabrous, $'-&' high. Blades of the leaves as- 

 cending, spatulate, obtuse at the apex, 3 // -7 // long, i i ^ // -2 // 

 wide, their upper surfaces clothed with glandular hairs, 

 gradually narrowed into a glabrous petiole Y^'-iYi' l n g; 

 raceme i-sided; flowers several; pedicels about i^ // long; 

 petals white, slightly exceeding the sepals; seeds oblong, the 

 testa close, roughened. 



In bogs, Anticosti and New Brunswick to Manitoba, south to 

 Florida and Louisiana. Also in the West Indies, and in northern 

 Europe. July-Aug. 



II 



