Perennial with several stems arising annually from a woody rootstock; stems erect or ascending, rarely spreading, slender, simple or sparingly branched, puberulous to villous, 0.1-0.25(-0.3) m tall. Leaves subsessile or shortly petiolate; blade very variable in shape from linear-elliptic to lanceolate, lanceolate-oblong, ovate, sub-rotund or obovate,(10-)15-40(-60) x (3-)5-20(-30)mm, subglabrous to villous, gland-dotted, apex acute to rounded, base cuneate to obtuse, margin entire or with few shallow teeth; petiole 0-5 mm long. Inflorescence often subcapitate or with 1-3 spaced verticils below the crowded apex; pedicels c. 1 mm long. Calyx 4-5 mm long at flowering, enlarging to 7-10 mm long, reticulate-veined, pubescent; tube campanulate. Corolla white to pale mauve, (8-)10-17 mm long with longitudinal violet lines on the upper lip. Stamens exserted by 14-20 mm.
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