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Male flowers soon falling; pedicels 1–2 mm long; buds 1 mm in diameter, pubescent; calyx lobes subequal, 1.5–2 × 1 mm, ovate-lanceolate, greenish; petals unequal, three of them 2 × 1 mm, spathulate, the other two 1.5 × 0.5 mm, narrowly elliptic, unguiculate, undulate, white; staminal column 2 mm high, free parts of filaments 0.5 mm long, anthers 0.5 mm long; pistillode c. 1 mm long, slightly 3-lobed.
Like 1 (C. serrata), but usually with the young stems, inflorescence axes and ♀ calyx-lobes evenly to densely beset with gland-tipped hairs, leaf-blades often broadly lanceolate, ♂ calyx-lobes evenly hispid without, ♀ flowers (1–)2–3 per inflorescence and the seeds globose, weakly lineate-rugulose, dull and often marmorate.. Fig. 29.
Leaf blades 2–14 × 0.5–4 cm, narrowly oblong-lanceolate to broadly elliptic-lanceolate, acute or subacute at the apex, cuneate or rounded at the base, serrate on the margins, thinly chartaceous, sparingly appressed-pubescent to subglabrous on both surfaces, 3–5-nerved from the base; lateral nerves in 6–12 pairs.
Erect, annual herb, up to 1 m high. Stems branched. Leaves alternate, margin serrate. Racemes axillary, with numerous male flowers above and a few basal female flowers. Flowers green.
An erect, ascending or scrambling, tufted annual herb, up to 1.8 m tall, although commonly much shorter, often branched, glandular-hispid when young; stems fibrous, up to 7 mm thick.
Inflorescences 2–11 cm long, with the peduncle up to 5 cm long; axes glandular-hispid; bracts smaller than the stipules, but otherwise resembling them.
Seeds 3–3.5 mm in diameter, globose, grey or greyish-brown, sometimes mottled blackish, white-lineate.
Fruit 4–4.5 × 6–7 mm, roundly 3-lobed, echinate, evenly glandular-hispid, green.
Stipules 1–4 × 0.7–1.5 mm, lanceolate, entire.
Petioles 0.1–2 cm long.
