Petiole 1.2-5.5 cm, puberulent; leaf blade obliquely ovate to nearly orbicular, 0.5-4 X 0.6-3 cm, puberulent, base cordate to truncate, margin crenulate-denticulate to remotely serrate, apex obtuse to acute; lateral veins indistinct. Cymes 1(or 2)-flowered; peduncle 2.5-6.5 cm, puberulent; bracts linear, 1-4 mm. Pedicel ca. 8 mm. Calyx actinomorphic, 5-sect from base; segments equal, linear-lanceolate, 3-5 X ca. 0.8 mm, outside puberulent. Corolla white, outside sparsely puberulent, inside glabrous; tube 7-8 mm; adaxial lip 3.5-5 mm, distinctly 2-lobed; abaxial lip 6.5-8 mm. Filaments ca. 3 mm, densely pubescent; anthers nearly globose, ca. 2.5 mm, beakless; staminodes 2. Pistil 7-10 mm; ovary 3.5-5 mm, sparsely pubescent. Style glabrous. Capsule ca. 1.3 cm. Fl. and fr. Apr-May.
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