Genus i. 



SUNDEW FAMILY. 



203 



I. DROSERA L. Sp. PI. 281. 1753. 



Bog herbs, with tufted 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 85 species, most abundant in Australia. Besides the following, 2 others occur in the 

 southeastern States. Our species are known as Sundew, or Dew-plant. Type species : Drosera 

 rotundifolia L. 



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. Eyebright. Fig. 2125. 



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



Drosera rotundifolia comosa Fernald, Rhodora 7 : 9. 1905. 



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, i-25-flowered ; pedi- 

 cels l"-2" long; flowers about 2" broad, opening in sunshine; 

 petals white to red, oblong, somewhat exceeding the sepals ; seeds 

 fusiform, pointed at both ends, the testa loose. 



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

 to Florida and Alabama, in the Rocky Mountains to Montana and 

 Idaho, and in the Sierra Nevada to California. Ascends to 2500 ft. 

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

 Parts of the flower are sometimes transformed into small green leaves. 

 Rosa-solis. Youth-wort. Moor-grass. Red-rot. Lustwort. July-Aug. 



I. D. rotundifolia. 



2. D, intermedia, 



3. D, longifolia. 



4. D. linearis. 



5. D.filiformis. 



2. Drosera intermedia Hayne. Spatulate-leaved 

 Sundew. Fig. 2126. 



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



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



1753- 



Drosera americana Willd. Enum. 340. 1809. , ' 



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



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

 Scape erect, glabrous, 2'-8' high. Blades of the leaves ascend- 

 ing, spatulate, obtuse at the apex, 3"-7" long, ii"-2" wide, 

 their upper surfaces clothed with glandular hairs, gradually 

 narrowed into a glabrous petiole i'-iV long; raceme l-sided; 

 flowers several; pedicels about li" long; petals white, slightly 

 exceeding the sepals ; seeds oblong, the testa close, roughened. 



In bogs, Newfoundland to Saskatchewan, south to Florida and 

 Louisiana. Also in Cuba, and in northern Europe. June-Aug. 



