Erect perennial herb 60 cm. tall, branched in the lower half, glabrous throughout.. Stems ridged and striate, slender.. Lowest leaves deltoid-ovate, soon becoming deltoid-pandurate with broad blunt lateral lobes at the base, the lamina to ± 4.5 × 2.75 cm., the petiole 1.5–2 cm., upper leaves lanceolate-hastate with a narrower central lobe, the uppermost frequently linear with no basal lobes; small rounded and often falcate stipuliform leaves also subtending many stem and branch leaves.. Inflorescence terminal, 7.5 × 0.8 cm., a spiciform thyrse formed of compacted cymes ± 0.5 cm. in diameter, only the lowest cymes being slightly distant.. Bracts and bracteoles deltoid, very acute, ± 2 mm., white, scarious, glabrous, erose-denticulate above with an excurrent midrib.. Perianth-segments elliptic-oblong, 2.5–3 mm., obtuse, glabrous, white, 1-nerved with the midrib excurrent in a very short mucro, erose-denticulate above.. Free portion of filaments subequalling or slightly shorter than the sheath, sinuses rounded, without teeth.. Ovary 2–3-ovulate... Stigmas 2(–3), longer than the ± 0.5 mm. style.. Capsule ± 1.75 mm., included.. Seeds ± 1.2 mm., black, shining, compressed, with convex hexagonal or rhomboid central areolae and scarcely or very feebly punctate reticulating furrows around the margins.
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