Description from Flora of China
Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite; petiole 2-7.5 cm X 0.6-2 mm; leaf blade elliptic to elliptic-ovate or elliptic-obovate, 4.5-13 X 2.3-6.5 cm, herbaceous, sparsely puberulent (hairs to 1.2 mm), eglandular, base oblique, rounded to subcordate, margin dentate to serrate, apex obtuse; lateral veins ca. 5 on each side of midrib, conspicuous. Cymes 1-flowered; peduncle 2-4 cm, sparsely pubescent; bracts absent or 2, free, narrowly linear, 2.5-3 X 0.3-0.5 mm, puberulent, margin entire, apex acute. Pedicel 1.3-3 cm, pubescent. Calyx 1.7-1.9 cm, 5-lobed; tube 5-10 mm; lobes equal, triangular-lanceolate, ca. 7 mm, outside sparsely puberulent, inside glabrous, margin entire, apex subulate-acuminate. Corolla purplish, 4.5-5.6 cm, glabrous; tube narrowly funnelform, 3-4 X 1-1.5 cm; adaxial lip ca. 1 cm; abaxial lip ca. 1.6 cm. Filaments ca. 9 mm, glandular puberulent near apex; anthers fused by entire adaxial surfaces, ca. 3 mm, glabrous; staminodes 2, ca. 6 mm. Pistil ca. 3.1 cm, sparsely glandular puberulent; ovary ca. 1.5 cm. Stigma flabellate, ca. 3 mm, 2-lobed. Fruit and seeds unknown. Fl. Jun-Jul.
After publication of the family treatment for the Flora of China,
this was treated as Henckelia monantha (W. T. Wang) D. J. Middleton & Mich. Möller (Taxon 60: 776. 2011).
* Forests, valley streamsides; 400-1600 m. NW Hunan (Sangzhi Xian, Yongshun Xian).