Description from Flora of China
Herbs, perennial. Stems short, densely villous. Leaves usually crowded at apex of branches (but not forming a basal rosette); petiole ca. 1 cm, pubescent; leaf blade linear to lanceolate-linear, 6-12 × 0.5-0.9 cm, papery, abaxially paler and villous especially along veins, adaxially dark green, densely white papillose, and subglabrous except for margin slightly pubescent, secondary veins 8-13 on each side of midvein, base attenuate, margin entire or undulate, apex obtuse. Racemes axillary, 5-10 cm, unbranched or with 1 or 2 branches at base; peduncle and rachis villous; bracts linear, 3.8-4.5 mm, abaxially pubescent, 1-veined; bracteoles linear, ca. 3.7 mm, abaxially pubescent. Pedicel 2-3.5 mm. Calyx ca. 6 mm, abaxially slightly villous; lobes linear-triangular, 4.5-5.1 × 0.5-0.6 mm, unequal, margin ciliate. Corolla pink, ca. 8 mm; tube basally cylindric for ca. 1.5 mm then gradually widened, convex at one side; lobes orbicular to suborbicular, 2.2-2.5 × ca. 2 mm, unequal. Stamens 4 with longer pair ca. 4.5 mm and shorter pair ca. 3 mm; filaments glabrous; staminode ca. 0.7 mm. Ovary ellipsoid, ca. 2 × 1 mm, glabrous; style unequally 3-lobed. Capsule ovoid-oblong, ca. 3 mm. Fl. Mar-May, fr. Aug-Sep.
● Dense forests; 1000-2000 m. Hainan.