Description from Flora of China
Perennials, stemless. Rhizome internodes inconspicuous. Leaves crowded at rhizome apex, opposite; petiole ca. 10 X 1-2 mm; leaf blade oblanceolate, 2-3 X 0.5-1 cm, papery, adaxially greenish white puberulent, eglandular, abaxially appressed white velutinous, base decurrent, margin entire, apex acute; lateral veins 2 or 3 on each side of midrib, inconspicuous. Cymes 1-flowered; peduncle nodding, 0.9-1.1 cm, densely puberulent; bracts 2, free, oblong linear, 4-6 X ca. 1 mm, densely puberulent, margin entire, apex obtuse to rounded. Pedicel 7-11 mm, densely puberulent. Calyx 5-sect from base; segments equal, lanceolate-linear, 1-1.2 cm X 1.6-1.8 mm, outside puberulent, inside glabrous, margin entire, apex acuminate. Corolla purplish, ca. 4.5 cm, outside sparsely puberulent, inside glabrous; tube funnelform, ca. 3.3 X 1.4 cm; adaxial lip ca. 8 mm; abaxial lip ca. 1.2 cm. Filaments ca. 1.1 cm, glabrous; anthers fused by entire adaxial surfaces, ca. 4 mm, woolly; staminodes 2, 3-4 mm. Pistil ca. 3.4 cm, densely puberulent; ovary ca. 1.2 cm. Stigma obtrapeziform, ca. 4.2 mm, 2-lobed. Fruit and seeds unknown. Fl. Apr-Jun.
* Limestone hills, also cultivated; ca. 300 m. Cultivated in Longtan Park; introduced from Guangxi (Yongfu Xian).