Didymocarpus polycephalus W. Y. Chun, Sunyatsenia 6: 299. 1946.

Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite; petiole 0.7-10 cm X 3-7 mm; leaf blade ovate to nearly orbicular, seldom elliptic, 3-12 X 2.8-11 cm, thin papery, sparsely appressed pilose and appressed pubescent, eglandular, base broadly cuneate, truncate, to nearly cordate, margin entire or repand to irregularly shallowly crenate, apex obtuse to rounded; lateral veins 3 or 4 on each side of midrib, inconspicuous. Cymes 2-7(-15)-flowered; peduncle 4-12 cm, villous; bracts 2, free, ovate to lanceolate or elliptic, 2-3.2 X (0.3-)1-1.8 cm, pubescent, margin entire, apex acute to attenuate. Pedicel 0.5-2 cm, puberulent and glandular villous. Calyx 5-sect from base; segments equal, linear-lanceolate, 1-1.5 cm X 1-2 mm, outside puberulent and glandular villous, inside puberulent, margin entire, apex attenuate. Corolla purplish, 3-4.5 cm, outside sparsely puberulent, inside puberulent in longitudinal lines near base of tube; tube nearly tubular, 2-2.5 X to 1.2 cm; adaxial lip ca. 7 mm; abaxial lip ca. 1.1 cm. Filaments 8-10 mm, sparsely puberulent and glandular puberulent; anthers fused by entire adaxial surfaces, 3-3.5 mm, abaxially villous; staminodes 2, 3.5-6 mm. Pistil ca. 3 cm, densely puberulent; ovary ca. 1.1 cm. Stigma cuneate, 2-4 mm, 2-lobed. Capsule erect, 4-5 cm. Fl. Jun, fr. Oct.

After publication of the family treatment for the Flora of China, this was treated as Primulina polycephala (Chun) Mich. Möller & A. Weber (Taxon 60: 784. 2011).

* Rocks in forested valleys; 600-800 m. N Guangdong (Ruyuan Xian, Yangshan Xian).