Herbs, small, creeping, much branched, cushionlike. Leaves opposite, small. Flowers axillary. Calyx tubular-campanulate, 5-angled, 5-toothed. Corolla subcampanulate, 4-lobed; lower lip 3-lobed, patent; upper lip entire, short, erect. Stamens 2, anterior. Capsule slightly flattened, 2-grooved, loculicidal. Seeds few, ovoid-fusiform, smooth.

One species: E Asia, Pacific Islands.