Description from Flora of China
Lianas 2-3 m tall, with ± densely yellowish pubescent axial parts. Stems terete. Petiole 6.5-7 cm; leaf blade ovate-circular, ca. 14 X 11-12.5 cm, abaxially densely dull yellowish villous, adaxially yellowish pubescent along midvein and lateral veins, base rounded or cordate, apex acute; lateral veins 11 or 12 pairs. Cymes many flowered, dense; peduncle 10.5-13 cm; bracts persistent, oblong or ovate-oblong, 1-1.3 cm X 5-8 mm, densely yellowish pubescent abaxially, apex obtuse. Sepals ovate-oblong, unequal, yellowish villous abaxially; outer 3 ca. 12 X 7 mm, apex obtuse or acute; inner 2 ca. 10 5.5 mm, apex acute. Corolla purple, broadly funnelform, ca. 4.5 cm, midpetaline bands sparsely villous; limb shallowly lobed. Stamens and pistil included, much shorter than corolla; filaments ca. 1.1 cm, densely villous basally; anthers sagittate, ca. 5.5 mm. Disc ringlike, ca. 1 mm high. Ovary conical, glabrous. Style ca. 3.3 cm, jointed at base; stigma capitate, 2-lobed. Fruit unknown. Fl. Nov.
* Forests, ravines; 900-1000 m. S Yunnan (Mengla Xian)