Annuals 15-20 cm tall. Stems purple, erect, rigid, few branched from middle, slightly 4angled, papillate. Basal leaves with petiole 1-2 mm; leaf blade lanceolate to ovate-elliptic, 1.8-2 cm × 6-8 mm, margin indistinctly cartilaginous, apex acute and apiculate, midvein distinct. Stem leaves widely spaced; petiole tube 1.5-2 mm; leaf blade lanceolate to ovate-elliptic, 1.2-1.5 cm × 4-5 mm, shorter than internodes, margin indistinctly cartilaginous, apex acute and apiculate, midvein distinct. Flowers few, subsessile. Calyx campanulate, 1.4-1.6 cm; lobes filiform-subulate, 9-10 mm, margin ciliolate, apex acuminate and apiculate, midvein distinct. Corolla blue, tubular-campanulate, 1.8-2.2 cm; lobes broadly ovate, 3.5-4 mm, margin entire, apex acute; plicae ovate-oblong, 2-3 mm, 2 or 3dentate, apex obtuse. Stamens inserted at middle of corolla tube, equal; filaments 5-7 mm; anthers ellipsoid, 2.5-3 mm. Style 3-4.5 mm; stigma lobes linear. Capsules narrowly obovoid, 7-8 mm; gynophore to 1.5 cm. Seeds brown, ovoid-ellipsoid, 1.2-1.4 mm. Fl. and fr. Jul-Oct.

* Grassland slopes; ca. 3300 m. Taiwan.