Euphorbia hirta L., it is an annual herb up to 15-50 cm high, hispid with long often yellowish crisped hairs. Stems many, usually terete, procumbent or ascending; Leaves simple, opposite, 2-4 x 1-1.4 cm, elliptic, lanceolate or obovate-lanceolate, acute or subacute, serrate or dentate, dark green above, pale beneath, base usually unequal obliquely rounded, stipules 1-2 mm, membranous, lanceolate-subulate, ciliate. Flowers unisexual, small, numerous and crowded together in dense terminal and axillary capitate cymes about 1 cm in diameter, involucre campanulate, ca. 1×1 mm, pilose, marginal lobes 5, triangular-ovate, glands 4, red, circular, oblong, or reniform, appendages white to reddish, narrowly elliptic to obdeltoid, to 0.3 × 0.2 mm, margin entire to slightly undulate. Male flowers 4-5, anthers red. Female flower, pedicel short, exserted from involucre, ovary 3-angular, sparsely pilose. styles 2, free, stigma slightly 2-lobed. Capsule 3-angular, 1-1.5 × 1-1.5 mm, smooth, shortly pilose, fruiting peduncle to 1.5 mm. Seeds narrowly ovoid, tetragonal, 0.7-0.9 × 0.4-0.5 mm, pink-red, sides transversely furrowed, caruncle absent.
Flowering in: Jul-Nov.
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