Perennial strongly aromatic with a slender often creeping woody root-stock. Stems few to several, slender, quadrangular often purplish, 10-30 cm, ascending, with a very fine indumentum of eglandular hairs. Leaves few, broadly ovate to orbicular, cordate, clearly crenate to serrate, c. 5-15 x 5-15 mm, thickish in texture, on both surfaces with short eglandular hairs, below with sessile oil globules; lowermost leaves with a petiole up to 3.5 cm, uppermost shortly petiolate. Inflorescence a terminal capitulum, sometimes with a few subterminal congested distant verticillasters; verticillasters c. 12-flowered; bracts ovate-oblong, white-pilose, long acuminate. Pedicels c. 2-3 mm. Calyx 5-6 mm long, white-pilose, often tinged violet, indistinctly bilabiate; teeth ovate-triangular long mucronate, not diverging in fruit. Corolla purple or dark blue, c. 10 mm long, externally pilose; tube narrow scarcely wider above. Stamens clearly exserted up to 2.5 mm beyond corolla upper lip. Nutlets oblong, c. 2 x 1 mm.