Plant: Annual forb to 45 cm; herbage with milky sap Leaves: leaves opposite, margins serrate, cauline, 1-3 cm, petioled to sessile; blade obovate to spoon-shaped, glabrous, tip obtuse to notched INFLORESCENCE: involucre < 1.5 mm, bell-shaped, glabrous; gland < 1 mm, oblong Flowers: flowers monoecious borne in cyathia, petaloid appendages minute; Staminate flowers 5-8, generally in 5 clusters around pistillate flower; Pistillate flower: 1, central, stalked; ovary chambers 3, ovule 1 per chamber, styles 3, divided ± 1/2 length Fruit: capsule, 2-3 mm, spheric, lobed, tubercled; Seed 1.5-2 mm, elliptic, round, yellow-brown; surface net-like Misc: Open, generally disturbed places; < 1300 m.