Description from Flora of China
Trees or shrubs, 3-5(-8) m tall, glabrous except for cyathia. Stems 5-7 cm thick, green, 3(or 4)-ribbed, branching from upper parts; ribs prominent, winglike, up to 1-2 cm wide, 3-5 mm thick, prominently triangular toothed. Leaves alternate, apically clustered, caducous; spine shields small, stipules pricklelike, spines paired, 2-5 mm; petiole very short; leaf blade obovate or obovate-oblong, 2-5 × 1-2 cm, base attenuate, margin entire, apex rounded. Cyathia subterminal, single, peduncle 2-3 mm; cyathophylls as long as involucre, membranous; involucre broadly campanulate, ca. 3 × 5 mm, lobes 5, rounded, denticulate; glands 5, entire. Male flowers many; bracts linear. Female flower: ovary pedicellate, exserted from involucre, smooth and glabrous; styles free; stigma slightly 2-lobed. Capsule 3-lobed, compressed, 3.4-4 × 4-5 mm. Seeds subglobose, ca. 2 × 2 mm, brown-yellow, smooth; caruncle absent. Fl. and fr. all year.
Euphorbia antiquorum is the type species for the genus Euphorbia. It is used medicinally.
Escaped or naturalized, more widely cultivated. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan, Yunnan, Zhejiang [Bangladesh, India, Indonesia, Malaysia, Myanmar, Pakistan, Sri Lanka, Thailand, Vietnam; wild origin obscure].