Herbs, perennial with cystoliths. Leaves petiolate. Inflorescences a panicle of spikes, usually reduced to a single terminal spike; bracts mostly shorter than calyx; bracteoles linear, minute. Calyx deeply 5-lobed, lobes similar (or posterior lobe shorter). Corolla tube cylindric, short; limb 2-lipped; lower lip 3-lobed; upper lip emarginate and galeate, lacking a stylar furrow; lobes ascending cochlear in bud. Stamens 2; anthers 2-thecous; thecae equally to subequally inserted, parallel, muticous at base; staminodes 0. Pollen 3-5-aperturate. Ovary with 2 ovules per locule. Capsule clavate with a solid sterile stalk at base, 4-seeded; retinacula present, not rising from base. Seeds lenticular.