Description

Key Characters:

Growth Form: Annual or perennial herbs or shrubs.

Stems:

Roots:

Leaves: Leaves simple. Opposite. Margins dentate. Usually petiolate. Stipules absent.

Flowers: Flowers numerous in densely crowded, axillary verticillasters, each flower +/- bracteolate. Calyx actinomorphic, usually bilabiate, narrowly funnelform, often curved in upper part, 8–10–nerved, 8–10-toothed, uppermost tooth longest, splitting longitudinally, usually persistent or sometimes only ventral 1/2 persistent. Corolla zygomorphic, bilabiate, tubular, somewhat curved, upper lip long, concave, villous, lower lip 3-lobed, median lobe slightly longer than lateral ones; nectary disk symmetrical. Stamens 4, ascending the upper corolla lip, lower pair longer; anther sacs divaricate, confluent; anthers dithecal, opening by longitudinal slits. Ovary superior, 2-carpellate; ovules 1 per ovary lobe, placentation basal-axile; style 1, subulate; stigmas 2.

Fruit: Nutlets 1-seeded; oblong or obovoid; glabrous. Seeds with endosperm absent or scanty and oily.

Ploidy:

Habitat:

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