Roots napiform, crown white lanate-villous. Stems robust, 25-30 cm tall; densely glandular lanate, villous, sparsely so on internodes. Petiole 2-4 cm; basal leaf blade elliptic, 5-7 × 3-3.5 cm, sparsely villous adaxially, densely lanate-villous abaxially, base subrounded, margin acutely serrate, apex obtuse; stem leaf blade ca. 4.5 × 2.5 cm, margin crenate. Spikes long; verticillasters (2-)4(-6)-flowered; floral leaves sessile, 1.5-3.5 cm × 2-4 mm, margin entire or serrate, apex acute; bracteoles linear, 8-10 mm. Calyx funnelform, ca. 2.3 cm in flower, to 3.5 cm in fruit, villous, glandular outside; limb pubescent inside, rotate-dilated, conspicuously net veined in fruit; teeth circular to broadly triangular, 2-2.5 mm, with apical spines ca. 1 mm. Corolla to 2.1 cm, glabrous outside, villous annulate inside; upper lip yellow, ca. 1.5 × 0.5 cm, falcate, sparsely pilose outside, margin bearded inside; lower lip orange, middle lobe obcordate, ca. 3 × 10 mm; lateral lobes ovate, ca. 2 × 3 mm. Filaments cobwebby, posterior appendages comblike-fimbriate, anterior appendages scaly. Style subequally 2-cleft. Nutlets black, apex densely villous-barbate. Fl. Jun-Jul, fr. Jul.
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