Stamens 4, didynamous, filaments of anterior pair circumflex at base; anthers cohering in pairs, thecae confluent.
Corolla bilabiate; tube short, produced at front into spur; posterior lip bilobed, anterior lip 3-lobed.
Capsule subglobose clearly or obscurely emarginate at apex, loculicidal.
Flowers solitary, axillary, pedicellate, ebracteate.
Seeds ovoid, reticulate-foveolate.
Ovary bilocular, ovules numerous.
Style slender.
Calyx 5-lobed.