Didymocarpus mengtze W. W. Sm.

Stems 11-20 cm, sparsely to densely appressed puberulent. Leaves opposite; petiole 0.2-3.2 cm; leaf blade elliptic to ovate or obovate, 5.7-11.5 X 4-6.6 cm, herbaceous, adaxially appressed puberulent to pilose, eglandular, abaxially sparsely pubescent, very sparsely yellow glandular, base oblique, broadly cuneate to rounded, margin dentate to serrate or double dentate to serrate, apex acute to obtuse; lateral veins 5-8 on each side of midrib. Cymes 5-11-flowered; peduncle 4-7.2 cm, sparsely glandular puberulent; bracts free, broadly elliptic to obovate, ca. 4 mm, adaxially puberulent, abaxially sparsely glandular puberulent, margin entire. Pedicel 2-8 mm. Calyx zygomorphic, 4-6 mm; limb 2-lipped; tube 1.5-2 mm; adaxial lip 3-lobed, obtrapeziform, 3-4 mm wide, lobes ovate-orbicular, ca. 1 mm wide; abaxial lip 2-lobed, obtrapeziform, ca. 4.5 mm, lobes triangular, 1.5-2 mm wide, glabrous, margin entire. Corolla purple to purplish red, ca. 2 cm, glabrous; tube cylindric, ca. 1.6 cm X 3 mm; adaxial lip ca. 3 mm; abaxial lip ca. 6 mm. Filaments ca. 3 mm, glabrous; anthers ca. 1.6 mm, nearly glabrous; staminodes apparently absent, ca. 1.2 mm. Pistil ca. 1.7 cm, glabrous; ovary ca. 1.2 cm. Capsule 2-2.5 cm. Fl. Jul, fr. Oct.

SE Yunnan (Mengzi Xian).

* Montane regions; 1200-2700 m.

Didymocarpus mengtze là một loài thực vật có hoa trong họ Tai voi. Loài này được W.W.Sm. mô tả khoa học đầu tiên năm 1912.

蒙自长蒴苣苔（学名：Didymocarpus mengtze）为苦苣苔科长蒴苣苔属下的一个种。