Perennial herb. Stems erect, 30-60 cm, branched, quadrangular, ± densely covered with long eglandular white hairs and with or without very short glandular papillae, leafy. Leaves narrow or broadly elliptic, 15-35 x 8-18 mm, pectinate-serrate, broad truncate or cordate, apically rounded, with an eglandualr pilose or villous indumentums mostly confined to the veins beneath and with numerous sessile glands, above almost glabrous; all leaves sessile or with a petiole to 0.5 mm. Inflorescence of terminal and lateral condensed spikes, occasionally lowermost verticillasters distinct, up to 10 x 1-1.5 cm. outer bracts ovate-lanceolate to broad obovate, up to 6 x 4 mm. Pedicels ± adpressed, to 4 mm. Calyx narrow tubular-obtriangular, eglandular pilose with or without sessile glands and minute glandular papillae; throat oblique; teeth unequal, linear, subulate, ciliate, as long as calyx tube. Corolla pale mauve or bluish, 10-15 mm. Nutlets 1.5 x 0.9-1 mm, ellipsoid, rounded above and below, brownish black, shiny, somewhat flattened, with a bibbed basal areale.