Perennial herbs. Leaves alternate, broad, palmately veined, petiolate. Flowers solitary in leaf-axils; bracteoles absent. Sepals almost equal; corolla 2-lipped, produced into a spur at base, upper lip 2-lobed, lower lip 3-lobed, at its base a prominent palate closing the mouth; stamens 4, in pairs of unequal length, included in corolla, anthers cohering in pairs, 2-locular; stigma entire. Capsule with the 2 locules dehiscing at the apex by several fissures; seeds many, tuberculate-wrinkled.
About 10-15 species, from the Mediterranean region and western Europe; 1 species naturalised in Australia.