This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
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 1-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.
Drosera rotundifolia L. Sp. Pl. 281. 1753.
Drosera rotundifolia comosa Fernald, Rhodora 7: 9. 1905.
Scape slender, erect, glabrous, 4'-10' 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, 1-25-flowered; pedicels 1"-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.