Petrocosmea mairei H. Lév.

Petiole 0.3-3.5 cm, pilose; leaf blade ovate to nearly orbicular or elliptic, 0.5-2.5 X 0.4-1.5 cm, adaxially pilose, abaxially densely puberulent, base slightly oblique, cuneate to nearly cordate, margin entire near base, crenate-dentate toward apex, apex acute to rounded; lateral veins conspicuous. Cymes 1-flowered; peduncle 2.6-5 cm, pilose; bracts linear, ca. 0.8 mm. Pedicel ca. 6 mm. Calyx actinomorphic, 5-sect from base; segments equal, lanceolate-linear, 2.5-3.2 X 0.8-1.5 mm, outside pilose. Corolla blue, outside puberulent, inside glabrous or puberulent; tube 3-4 mm; adaxial lip ca. 3 mm, distinctly 2-lobed; abaxial lip ca. 6 mm. Filaments 0.5-2 mm, rust-brown puberulent; anthers nearly globose, 1-1.2 mm, beakless; staminodes 2(or 3). Pistil 5.2-6 mm; ovary ca. 3 mm, pilose. Style pilose near base. Capsule 4-6 mm. Fl. May, Aug, fr. Aug.

SW Sichuan, NE Yunnan.

* Hilly regions; 2000-2600 m.