GROWTH HABIT: Annual, nearly erect to 24 inches.
LEAVES: Usually opposite to 3 inches long, oval to lance-shaped, hairy, coarsely toothed, often with a central reddish spot.
STEMS: Many branched, curved upward with branches also curving upward.
FLOWER: Small, yellow-green to green, without petals, in clusters at ends of branches.
SEEDS: To 1/6 inch long, spherical to egg-shaped, gray, in a 3 celled smooth capsule. 1 seed per cell.
OTHER: White milky sap throughout the plant. Native to U.S. on dry or moist soils.