D. rotundifolia: leaves on long stalks, nearly orbicular, covered on the upper surface with long, red, viscid hairs, each bearing a small gland at the top; flower-stems slender, erect, glabrous, 2-6 inches high, the upper portion, consisting of a simple or once-forked unilateral raceme, rolled back when young, but straightening as the flowers expand; petals white, expanding in sunshine. - Bogs, and wet heathy ground. Fl. July, August.

D. longifolia: resembling the last, but the leaves much more erect, not half so broad as long, and gradually tapering into the footstalk; flowering stem shorter and stouter. - Bogs. Fl. July, August.