Perennial, up to 0.3 m tall, with ascending flowering branches extending upwards beyond a central tuft of basal leaves. Leaves dimorphic, elliptic to narrowly elliptic, the base attenuate, main veins abaxially raised and adaxially sunken, surface on both sides puberulent to glabrescent, grey-green to red-green, concolorous, the margin dentate in upper third and entire lower down; basal leaves with petiole (10-)40-80(-130) mm long, pubescent to glabrous along entire length, lamina (15-)30(-45) mm long, (7-)10-15(-25) mm wide; margin occasionally entire or with two to five acuminate teeth in upper third; apex acuminate; upper leaves (on flowering shoots) often sessile or petiolate, petiole (0-)10(-15) mm long, pubescent to glabrous along entire length, lamina (7-)10(-25) mm long, (1-)2-3(-8) mm wide; margin entire or occasionally with two to three acuminate teeth in upper third; apex acuminate. Inflorescence with a central single sessile bisexual umbellule mostly surrounded by five to seven lateral rayed male umbellules (or sometimes with many lateral, rayed male umbellules only). Male umbellules 1-2 mm long, with a single male flower each. Bisexual umbellules with a single flower each; borne in axils of flowering shoots; bracts of male umbellules paired, up to 1 mm long, not foliaceous, glabrous; bracts of the central bisexual umbellule paired, 1-2.5 mm long, 1-2 mm wide, lanceolate, glabrous. Flowers with cream coloured petals; petals glabrous. Fruit widely elliptic, 1.5-2 mm long, 2-2.5 mm wide in commissural view, with bulging commissure, ribs not prominent, the surface wrinkled, glabrous; stylopodium not prominent.
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Tufted, suberect perennial to 50 cm. Leaves as in C. difformis Flowers whitish, only 1 (not 3-5) flower per male umbellule. Fruit small, widely elliptic, wrinkled.