Euphorbia platyphyllos

Erect or ascending annual herb 15–110 cm high, glabrous or pubescent; stems few, each usually with 5 fertile branches which are further branched. Cauline leaves sessile, alternate, obovate- to oblong-lanceolate, 10–60 mm long, 3–15 mm wide, apex acute, mucronate, base deeply cordate, margins finely and minutely serrate; leaves on fertile branches elliptic-oblong to triangular, to 30 mm long, to 15 mm wide. Cyathia 1 or 2 in uppermost axils or 2 or 3 terminally; peduncles to c. 1 mm long; involucre campanulate, c. 1.5 mm long; glands suborbicular, c. 0.5 mm long, entire; female flowers with styles apically divided into 2 filiform stigmas. Capsule subglobose, 2–3 mm diam., covered with hemispherical tubercles; seeds subglobose, c. 2 mm long, smooth, olive-brown, caruncle reniform, very small. Flowers spring and summer.