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A monoecious annual herb up to 45 cm. high, commonly with a single stem which is 3-branched about halfway up, the branches then themselves 3-or else 2-branched.. Stems stiffly stellate-hispid, the stellate hairs with one ray much larger than the others.. Leaves whorled, opposite or alternate; petiole 4–9 mm. long, densely to evenly stellate-hirsute; blade ovate, 2–5 cm. long, 1–3 cm. wide, acute or subacute, cuneate or ± rounded, with 2 stipitate discoid basal glands at the apex of the petiole, bicrenate-biserrate, membranaceous, 5-nerved from the base, lateral nerves 3–6 pairs, sparingly ± simply hirsute on the upper surface, but stellate-hirsute along the midrib and main nerves above, evenly stellate-hirsute beneath.. Stipules filiform, 3–5 mm. long, sparingly stellate-pubescent.. Racemes terminal, 1.5–2.5 cm. long, the lower half ♀, the upper half ♂; axis evenly stellate-pubescent; bracts linear, 2–3 mm. long, sparingly stellate-pubescent and often also with long gland-tipped branched or unbranched hairs at the base.. Male flowers: pedicels 1 mm. long, pubescent; calyx-lobes 5, elliptic-ovate, 1 mm. long, 0.5 mm. wide, acute, stellate-pubescent without, glabrous within, with an apical tuft of hairs; petals 5, linear-oblong, 1 mm. long, sparingly pubescent, white; disc-glands free, obovoid; stamens 10, filaments 1.5 mm. long, subglabrous, anthers 0.3 mm. long; receptacle pilose.. Female flowers: pedicels 1.5 mm. long, pubescent; calyx-lobes 5, unequal, oblong-linear, 2–4 mm. long, 0.5–0.7 mm. wide, obtuse, sparingly stellate-pubescent without, glabrous within, slightly accrescent; petals 0; disc ± pentagonal, very flat; ovary subglobose-subtrilobate, 1 mm. long, 1 mm. diameter, sparingly stellate-pubescent; styles 3, shortly united at the base, 1.5 mm. long, ± erect, sparingly pubescent, bifid almost to the base, the lobes filiform.. Fruit trilobate-subglobose, 3 mm. long, 3 mm. diameter, septicidal, sparingly stellate-pubescent.. Seeds somewhat compressed-ovoid, 2.5 mm. long, 2–2.5 mm. wide, grey or brownish mottled, minutely reticulate-rugulose, shiny, with a small caruncle.
Erect herb to 1 m high, annual. Indumentum fawn to pale brown. Stems with dense sessile stellate trichomes. Stipules subulate, 2.5–9 mm long, entire. Leaf lamina elliptic to oblanceolate, 5–60 mm long, 4–50 mm wide; base cuneate to rhomboid; margins crenate, with 10–22 teeth; tip acute; venation palminerved with 5 veins at base and 6 or 7 lateral veins per side of midrib, tertiary reticulate veins obscure; lower surface pale green, venation weakly visible, with sparse sessile glands and sparse sessile to shortly stalked stellate trichomes; extrafloral nectaries 2 at top of petiole, ellipsoid, stipitate to 1 mm. Male flowers: pedicels 0.8–1 mm long; sepals lanceolate-ovate, 1.5–1.7 mm long; petals obovate, 1.5–1.7 mm long; stamens 9–12. Styles 3, bifid once. Fruit trilobate, globose, 3.5–4.5 mm long, 4–4.5 mm diam., with sparse sessile stellate trichomes.
