Stems 0.7-5.5 cm, puberulent near base, glabrous above. Leaves opposite; petiole 3-12 cm; leaf blade broadly ovate to orbicular, 2-9 X 2.7-8.5 cm, herbaceous, adaxially appressed puberulent, eglandular, abaxially nearly glabrous, sparsely puberulent along veins, eglandular, base cordate to truncate, margin serrate to crenate, apex acute to rounded, basal veins 5 or 6; lateral veins 2 or 3 on each side of midrib. Cymes 4-20-flowered; peduncle 6-15 cm, glabrous; bracts free, ovate to elliptic, 2-4 mm, glabrous, glandular abaxially, margin entire. Pedicel 2-4 mm. Calyx slightly zygomorphic, 5-sect from base; segments unequal, lanceolate to linear, 3-5 X 0.6-1 mm, glabrous, margin entire. Corolla orange, drying purplish, ca. 2 cm, glabrous; tube cylindric, ca. 1.3 cm X 3-4 mm; adaxial lip ca. 3 mm; abaxial lip ca. 7 mm. Stamens glabrous; filaments ca. 2.8 mm; anthers ca. 1.8 mm; staminodes absent. Pistil ca. 1.2 cm, glabrous; ovary ca. 9 mm. Capsule 1.9-2.3 cm.
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