Description

Key Characters:

Growth Form: Aromatic, rhizomatous perennial herbs.

Stems:

Roots:

Leaves: Leaves simple. Opposite. Surfaces glandular punctate. Petiolate. Stipules absent.

Flowers: Flowers small, in axillary verticillasters or in terminal, congested or interrupted spikes, each flower +/- bracteolate. Calyx actinomorphic, campanulate to cylindrical, 10–nerved, 5-toothed, the teeth ± equal, splitting longitudinally, usually persistent or sometimes only ventral 1/2 persistent. Corolla zygomorphic, slightly bilabiate, funnelform to campanulate, tube short, upper lip entire or emarginate, lower lip 3-lobed; nectary disk often present at base of ovary, annular or developed on anterior side only. Stamens 4, equal, included in or exserted beyond corolla tube; anther sacs parallel; anthers dithecal, opening by longitudinal slits. Ovary superior, 2-carpellate; ovules 1 per ovary lobe, placentation basal-axile; style 1; stigmas 2.

Fruit: Nutlets 4; 1-seeded; ovoid to ellipsoid; smooth. Seeds with endosperm absent or scanty and oily.

Ploidy:

Habitat:

Elevation Range: