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Perennial stoloniferous herb up to 1.5 m. Leaves ovate, acuminate, entire or crenate, attenuate at base, 13-84 x 8.6-43 mm, rough when dry, with multicellular curved eglandular trichomes and with large 'boomerang-shaped' cystoliths, green, often blue-green below. Inflorescence terminal or axillary, of monochasial cymes (inflorescence units) umbellately arranged; peduncles of inflorescence units 1-10 mm long. Bracts: secondary bracts leaf-like, tertiary bracts free, but clasping at the base, obovate, 10-20 x 2.6-7.6 mm, glandular-pubescent; quaternary bracts lanceolate, glandular-pubescent. Calyx tube 0.75-1 mm long, 5-lobed, lobes 3.5-5.5 mm long. Corolla 22-32 mm long, sparsely glandular-pubescent, white, pink or pale lilac with dark purple honey guides; lip in lower position narrowly elliptic. Stamens: filaments glabrous. Fruit 8-13 mm long. Seeds 2-2.5 x 1.4-2.1 mm, verrucose and tuberculate.
Perennial herb, up to 1.5 m high. Cystoliths in leaves predominantly 'boomerang'-shaped. Secondary bracts leaflike, longer than 10 mm. Corolla lip in lower position obovate, corolla almost glabrous. Calyx tube 0.75-1.00 mm long. Seeds verrucose. Flowers white, pink or pale lilac with dark purple honey guides.
Perennial herb, 0.2-1.2 m high. Leaves with cystoliths predominantly boomerang-shaped. Calyx 5-lobed; tube 0.75-1.00 mm long. Corolla almost glabrous; lip in lower position obovate. Seeds verrucose. Flowering time Dec.-Oct.
Straggling herb 2-3 ft. high, laxly branched, sometimes with viscid hairs
