(L.) Millsp., Publ. Field Columbian Mus., Bot. Ser. 2:302. 1909
Euphorbia hypericifolia L.
Hierba de pollo
Monoecious, glabrous herb, usually erect, to 60 cm tall; stems somewhat woody at base, ca 3 mm diam, reddish.
Leaves opposite, simple; petioles 2-4 mm long; stipules interpetiolar, subpersistent, triangular or sometimes forked especially at apex of plant; blades ovate-elliptic to obovate-elliptic, obtuse to acute at apex, rounded and inequilateral at base, 1.5-3 (3.5) cm long, 7-15 mm wide, serrate. Flowers naked, the cyathia glabrous, the glomerules loose, short-stalked, axillary or terminal, leafless or bearing a few inconspicuous reduced leaves; disk with glands suborbicular, their appendages white or pink; stamen 1; styles 3, bifid. Capsules subspherical, to 1.6 mm diam (1.2 mm when dry); seeds reddish-brown, less than 1 mm long, obtusely 3-angulate. Croat 9201.
Occasional in clearings, less abundant than C. hirta or C. hyssopifolia; perhaps preferring taller-grass areas thanC. hyssopifolia. Found fertile throughout the year.
Throughout the New World tropics and subtropics. In Panama, known principally from tropical moist forest in the Canal Zone, all along the Atlantic slope, and in Panama and Darien; known also from premontane moist forest in Panama, from premontane wet forest in Panama, and from tropical wet forest in Colon.