Perennial, semi-succulent herb, up to 1.2 m long; stems procumbent to ascending. Leaves petiolate, ovate 16-40 x 12-40 mm, base truncate, apex acute to rounded, margins crenate-dentate, teeth 3-6 pairs. Inflorescence: rachis 40-220 mm long; verticillasters 2-6-flowered. Flowers white to pale mauve. Calyx erect, uppermost tooth erect; 4 lower teeth spreading, linear-subulate. Corolla: tube deflexed, expanded to slightly saccate base, scarcely narrowing to throat; lower lip shallowly boat-shaped, horizontal. Stamens curved in lower lip. Flowering time Mar.-July.
Sprawling, semisucculent perennial to 30 cm. Leaves ovate, toothed. Flowers in verticils, calyx glabrous, corolla slightly swollen below, white to mauve.