||Leaves membranous, ovate to lanceolate, 9-15 cm long, 2.5-5.6 cm wide, upper surface sparsely hispidulous to glabrate (hairs spreading to appressed), sparsely glandular-dotted, lower surface moderately hispidulous along veins, rarely between them, evenly glandular-dotted, margins serrate-crenate to dentate-crenate, apex acuminate, base broadly cuneate to truncate, petioles 2.5-4 cm long, densely hispidulous.
||Flowers (2-4)6 per verticillaster, in leafy, usually lax, compound, racemose inflorescences ca. 8-20 cm long, consisting of the primary branch and ± 2 to several shorter lateral branches immediately below, pedicels 4-10 mm long, densely hispidulous, usually some of the hairs gland-tipped, bracts ovate, 4-13 mm long, lowermost pair larger, 10-32(-50) mm long, bract pubescence same as that of leaves except both surfaces densely glandular-dotted; calyx
campanulate, 6-7 mm long, veins ± conspicuous, hispidulous (occasionally some hairs gland-tipped), densely glandular-dotted, the teeth narrowly deltate to deltate, 1-2.5 mm long, apex acute; corolla white, tube ca. (12-)14-15 mm long, short-hirtellous, upper lobe ca. 3-5 mm long, short-hirtellous, lower lobe ca. 7-14 mm long.