Plants perennial. Stems ca. 45 cm, 1 to few, ascending to erect, unbranched, densely yellow-brown villous, with widely spaced leaves. Petiole ca. 3 × as long as blade to obsolete, densely villous; leaf blade broadly ovate to narrowly triangular-ovate, rarely oblong-ovate, 2-5(-10) × 1.2-4.5(-5) cm, papery, corrugate when young, adaxially villous, abaxially subglabrous, spreading villous on veins, without glands, base cordate to rounded, margin irregularly double crenate, apex obtuse to rounded. Verticillasters 2-4-flowered, in terminal racemes; lower bracts leaflike, broadly ovate to rhombic-ovate, subequal to calyx, gradually reduced toward apex, glandular hairy, margin dentate, apex acuminate to subacute. Calyx campanulate, 2-lipped to 1/2 its length, ca. 1 cm in flower, to 1.5-1.8 cm in fruit, villous, glandular hairy, tube as long as limb; upper lip broadly triangular, margin entire, with 3 minute, ovate-lanceolate acuminate teeth. Corolla violet or blue, 2-2.5 cm, pilose; tube obliquely interrupted pilose annulate inside, ca. 2 cm, base cylindric, adaxially gradually dilated beyond hairy annulus, erect; upper lip ca. 5 mm, straight, broadly ovate to circular. Connectives arcuate, lower arms slightly shorter than upper. Fl. and fr. Jul-Aug.
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