Description from Flora of China
Shrubs evergreen, ca. 2 m tall, sparsely branched. Twigs terete, spreading pubescent, glabrescent; bud scales inconspicuous. Leaves scattered; petiole ca. 1 mm, strigose; leaf blade ovate to cordate, 8–12 × 3.5–5.5 cm, thinly leathery, abaxially sparsely strigose on midvein, adaxially glabrous, secondary veins ca. 10 pairs, fine veins raised on both surfaces, base cordate or obtuse, sometimes auriculate, margin plane, entire, apex acuminate to 2.5 cm. Inflorescences racemose, 1(–3) from same axil, 3.5–8 cm, densely spreading pubescent, 3–8-flowered; bracts triangular, 1–2 mm. Pedicel 5–8 mm, indumentum as with rachis. Hypanthium ca. 1 mm, densely pubescent; calyx lobes triangular, 2–4 mm, glabrous or with hairs. Corolla greenish, broadly campanulate, ca. 5.5 mm, glabrous; lobes reflexed, triangular. Filaments ca. 2 mm, pubescent; anthers ca. 3 mm, with 2 falcate spurs; tubules ca. 2.5 × as long as thecae. Ripe fruit unknown. Fl. May.
Evergreen valley forests. SE Yunnan [N Vietnam].