Delicate, ± sparsely pubescent annual, up to 120 mm tall. Leaves petiolate (at least lower ones), elliptic, dorsiventrally flattened and slightly succulent, 4-15 x 2-7 mm. Flowers in loose, mostly terminal clusters, on slender pedicels, cup-shaped, petals 1-2 mm long, white, tinged red.
Like C. oblanceolata but leaves and sepals hairy or at least aristate.