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Genus :


Family :



Erect or ascending herbs, subshrubs or shrubs. Leaves opposite, entire or crenate. Flowers sessile in terminal or axillary spikes or heads, blue or yellow. Bracts large, ovate or lanceolate, 4-ranked, each 1-flowered, bracteoles small, sometimes absent. Calyx 5-lobed, lobes linear-lanceolate, equal. Corolla tubular-vetricose or funnel-shaped, 5-lobed, subequal, lobes obtuse. Stamens 4, didynamous, all fertile, included, anthers dithecous. Ovary 2-locular, each locule 3-10 ovuled, style long, filiform, stigma unequally 2-lobed. Capsules linear or linear-oblong, without stipe. Seeds compressed, discoid, densely hygroscopically hairy.

Key to the species

Serial Key Reference
1a. Corolla tubular-ventricose; longer filaments glabrous in the upper half H. hirta
1b. Corolla funnel-shaped; longer filaments densely bearded in upper half H. latebrosa