Perennial herb, 0.03-0.06 m high; stems slender, creeping, mat-forming. Leaves broader than long, suborbicular, reniform. Flowers solitary or in terminal, few-flowered cymes, bracteate. Calyx: segments 5, lanceolate to ovate, keeled or with thick wing. Corolla yellow; tube 5-8 mm long; clawed. Stamens inserted in corolla sinuses; anthers with yellow or orange apical glands. Style with swelling below middle; stigma capitate, bilobed. Fruit a capsule.
Procumbent, mat-forming, perennial herb, up to 60 mm high. Stems rooting at nodes. Leaves suborbicular, reniform or ovate-cordate. Flowers: in terminal few-flowered cymes or solitary; filaments inserted in corolla-sinuses; anthers with apical gland small, round and yellow, or big and orange; style with swelling below middle; corolla with tube 5-8 mm long, yellow; Jul.-Jan.