Herbs annual or biennial. Stems erect, 30-95 cm, pubescent, glandular villous, much branched. Petiole 1-11 cm, shorter toward stem apex, sparsely villous; leaf blade 3-lobed, triangular-hastate, or sagittate, 3-12 × 2.2-12 cm, adaxially pilose or pubescent, abaxially pubescent, glandular, base cordate, with ovate, acute basal lobes, margin serrate or crenate above base, apex acuminate to acute. Inflorescences pubescent, glandular villous; verticillasters 2(-4)-flowered, widely spaced; bracts narrowly lanceolate, 3-9 × 1.2-1.5 mm, margin entire or 2-4-toothed. Pedicel ca. 4 mm. Calyx campanulate, 0.9-1.1 cm, sparsely yellow-brown glandular, veins and margin glandular villous; upper lip triangular, ca. 3 × 6 mm, apex ± 3-mucronate; lower lip subequal upper, teeth obtusely triangular, apex short acuminate. Corolla yellow, 2.1-2.3 cm, pilose; tube ca. 1.5 cm, transversely pilose annulate inside, cylindric toward base, abruptly dilated, curved upward beyond hairy annulus; upper lip oblong, ca. 6.5 × 6 mm; lower lip ca. 5 × 12 mm. Fertile stamens exserted; filaments ca. 5 mm; connectives ca. 6.5 mm, arcuate, upper arms longer. Nutlets obovoid, ca. 3 × 2 mm, brown, rounded. Fl. Jul-Sep, fr. Sep-Oct.
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