Euphorbia davidii

Erect or ascending annual herb to c. 50 cm high; stems simple, or usually, many-branched, with scattered fine, semi-appressed to spreading bristles. Leaves mostly opposite toward base, but alternate in upper parts of the plant; petiole 7–25 mm long, shortly bristly; blade usually narrowly to broadly elliptic, c. 15–80 mm long, 5–32 mm wide, margins coarsely and irregularly crenate-dentate, recurved to flat, apex acute to obtuse, surfaces strigose; leaves surrounding cyathia similar to sterile leaves but usually smaller. Cyathia clustered, often head-like at tips of branchlets; peduncles 0.5–1 mm long; involucre cylindric, 2.5–3 mm long, glabrous, divided into 5–7 linear, papillate lobes; gland 1, c. 1 mm long, oblong, lacking appendages; female flowers with styles c. 1 mm long, bifid from half way or nearer base. Capsule broadly ovoid, c. 3 mm long, 4.5 mm diam., glabrous; seeds ovoid, angular in cross-section, c. 2.5–3 mm long, grey, brown or blackish, with low tubercles irregularly arranged or in transverse rows; caruncle c. 0.5 mm long. Flowers mostly Jan–Apr.