This species was included in Corchorus confusus by Wild, but the comparison of live and herbarium material indicates that two distinct taxa are involved and that the populations from deep black turf or clay soils represent a distinct species, ecologically separated from C. confusus. Corchorus argillicola is related to C. confusus and C. trilocularis by the more or less straight capsules and fruiting pedicels. Herbarium specimens of these three species may easily be confused. Wild hypothesized the confusion of C. confusus and C. trilocularis in herbarium material to the possibility that C. confusus is of hybrid origin with C. trilocularis and C. asplenifolius as putative parents. However, field visits have indicated that these species are quite different. The new species differs mainly in the distribution of trichomes, which occur all over the surface on the capsules, and in the lack of longitudinal ridges on the capsules at all stages of development. In contrast, the capsules of C. confusus are angular, and sparsely scabrous on the angles or glabrous, whereas in C. trilocularis they have trichomes confined to the ridges and on the angles, and are otherwise glabrous. Furthermore, this new taxon is a perennial, whereas C. trilocularis is an annual weed of cultivation.
Perennial herb with prostrate or spreading stems from a woody rootstock; branches with pubescence all around stem, or sometimes with line of short hairs on one side of stem only. Leaf blade narrowly ovate, 30-50(-80) x 10-18(-25) mm, obtuse in basal leaves, crenate or serrate-crenate, sometimes with pair of basal setae, pubescent on both surfaces, especially on nerves, hairs not tubercle-based; petiole up to 15 mm long, pubescent; stipules up to 7 mm long, setaceous, pubescent. Inflorescence of (1)2-4-flowered cymes opposite upper leaves; peduncles 3-5(-20) mm long, pubescent, pedicels up to 3-5(-7) mm long, pubescent. Sepals narrowly lanceolate, up to 8 mm long, pubescent abaxially. Petals yellow, narrowly obovate, up to 8 x 5 mm, with short ciliate claw, androgynophore ±0.5 mm long, with an annulus. Stamens numerous. Ovary cylindrical, densely pubescent; style ±2.5 mm long, slender, glabrous, stigma cuspidate. Capsules up to 90 mm long; fruiting pedicel straight, densely or sparsely pubescent, without longitudinal ridges. Seeds numerous, black, ±1.5 x 1 mm.