Description from Flora of China
Didymocarpus secundiflorus W. Y. Chun, Sunyatsenia 6: 293. 1946.
Perennials, stemless. Rhizome internodes inconspicuous. Leaves basal, opposite; petiole 1.2-3.4 cm X 1.5-2.5 mm; leaf blade broadly ovate to narrowly elliptic, 2.2-4 X 1.1-3 cm, papery, adaxially densely appressed villous and puberulent, eglandular, abaxially puberulent, base cuneate to nearly truncate, margin repand to indistinctly denticulate, apex acute to obtuse; lateral veins ca. 3 on each side of midrib, inconspicuous. Cymes 1-6-flowered; peduncle 2.4-4.5 cm, spreading pubescent; bracts 2, free, linear, 2.5-6.5 X ca. 1 mm, pubescent, margin entire, apex acute. Pedicel 3-7 mm, densely puberulent. Calyx 5-sect from base; segments equal, narrowly triangular to linear-lanceolate, ca. 4 X 0.8-1 mm, outside densely villous, inside puberulent, margin 1- or 2-denticulate, apex acute. Corolla purplish, ca. 2.2 cm, outside puberulent, inside puberulent on the limb; tube cylindric, ca. 9 X 3.5 mm; adaxial lip ca. 3 mm; abaxial lip ca. 7 mm. Filaments ca. 3 mm, glabrous; anthers fused by entire adaxial surfaces, ca. 1.6 mm, glabrous; staminodes 3, central ca. 0.3 mm, laterals 0.6-0.8 mm. Pistil ca. 1 cm, puberulent; ovary ca. 3 mm. Stigma obdeltoid, ca. 2 mm, 2-parted. Capsule erect, 7-9 mm. Fl. May.
After publication of the family treatment for the Flora of China,
this was treated as Primulina secundiflora (Chun) Mich. Möller & A. Weber (Taxon 60: 784. 2011).
* Rocks in shaded areas. Guizhou (Qingzhen Xian).