Male and ♀ flowers as described under the genus.
Inflorescences up to 5 mm. in diameter, bracts ciliate, linear to narrowly lanceolate.
Achenes covered with hooked hairs and glands, ± 1.75 mm. long.
Lower 1–2 pairs of leaves opposite, upper leaves alternate; stipules lanceolate, long-acuminate, glabrous or ciliate, 2–5 mm. long, 0.3–0.8 mm. wide; petiole 25–47 mm. long, pubescent or with scattered stiff hairs; lamina lanceolate, 2–7.5 cm. long, 1.5–4 cm. wide, base cuneate, margin clearly crenate with 5–12 teeth on each side; lateral nerves 4–5 pairs, basal pair reaching the upper 1/3 of lamina before arching towards the midnerve and uniting with the upper lateral nerves; upper surface with sparse appressed stiff hairs, lower with hairs numerous on veins and a few scattered hairs.
Stems up to 80 cm. high, branched from the base, lower part of branches sometimes rooting at nodes, moderately to sparsely pubescent with patent stiff or slender curly hairs, sometimes also with a few hooked hairs.
Female flower c. 2 mm. long, stigma c. 1 mm. long, sessile, filiform.
Achene ovoid, brownish, c. 2 mm. long.
Bracts narrowly lanceolate, often crowned by bristles.
Male perianth c. 1 mm. long, with 2–3 apical bristles.
Inflorescences usually bisexual, consisting of a dense, ebracteate cluster of male flowers in the axil of one stipule and a bracteate cluster of female flowers in the axil of the other stipule; sometimes also a few flowers on a short axillary branch with much reduced leaves, or only female flowers in a cluster in the leaf axil.
Erect annual herbs to c. 30(80) cm. tall, sometimes branched from the base, sometimes stems or branches rooting at the lower nodes, puberulous.
Leaves alternate, lower 1–2 pairs opposite, 2–4(7.5) x 1–2.5(4) cm., ovate; apex long acuminate; base cuneate to rounded; margin crenate; lamina sparsely pilose above, and on the nerves beneath, hairs appressed.
Petiole 0.8–4.7 cm. long, puberulous.
Stipules up to 2–5 mm. long, lanceolate.
Slender annual herb. Stems up to 0.5 m high, much branched, sometimes rooting at nodes, moderately to sparsely pubescent with patent stiff or slender curly hairs, sometimes also with a few hooked hairs. Leaves lanceolate, 23-75 x 14-40 mm, base cuneate, margin clearly crenate with 5-11 pairs of teeth, upper surface with sparse appressed stiff hairs, lower with numerous hairs on veins, few scattered hairs between veins; petiole 25-47 mm long; stipules lanceolate, 2-5 x 0.3-0.6 mm, attenuate, glabrous or ciliate. Inflorescence up to 5 mm in diameter; bracts linear to narrowly lanceolate, ciliate. Achenes covered with broad hooked hairs and glands, ±1.75 x 1 mm, double fruits up to ±3 x 2.5 mm present in Namibian material.
Slender, annual herb, up to 0.5 m high. Apical tooth on leaves usually 2-3 times as long as broad. Stipules lanceolate with apex attenuate. Anthers white. Flowers green.
Like D. capensis but leaves lanceolate to ovate, sharply toothed with apical tooth longer than wide and stipules lanceolate.
Slender, annual herb, up to 0.5 m high, much branched. Leaves with blades 2-3 x as long as broad, margins with apical teeth, sparse, appressed, stiff hairs on upper surface, lower surface with many hairs on veins, a few scattered ones between veins. Stipules narrowly ovate with apex attenuate. Flowers: anthers white; perianth green; Nov.-Mar. Fruit covered with broad, hooked hairs and glands.
In northern Namibia, the Northern Province, Gauteng, Mpumalanga, the Free State, Kwa-Zulu-Natal, Lesotho and the Eastern Cape; tropical East Africa as far north as Ethiopia.