Petals, 2 to 5, very short, overtopped by the calyx, often none. Styles, 4. Leaves, broadly lance - shaped, sessile, very bright green. Stem, weak, much forked, the flowers in leafy cymes at the ends and in the forks of the branches. 6 to 18 inches high. Summer.

Wet meadows and low, shaded grounds. New Jersey northward and westward.