Herbs, sometimes suffrutescent; stems erect or declining, much branched, pubescence often arranged in two opposite lines, the old bark often exfoliating. Leaves linear to ovate, entire, glabrous or pubescent, sessile or petiolate. In-florescences in terminal, 4-sided spikes; bracts opposite, 4-ranked, conspicuous, often closely imbricate with cuspidate apex; pedicels 2 per bract. Flowers with the calyx 4-5-merous, equal, the segments ciliate; corollas funnelform to tubular, the lower lip entire, the upper lip 3-lobed, the lobes about equal; stamens 2, included in the entire lower lobe, the anther cells slightly unequal. Capsules clavate, apiculate, 4-or 2-seeded; seeds flattened, papillate or muriculate.
Home