Perennials 30-80 cm tall. Rhizomes blackish, short, with few slightly fleshy rootlets. Stems erect, striate, simple, base sheathed by blackish remains of old petioles. Basal leaves petioles flattened, 4-15 cm, base connate; leaf blade lanceolate to narrowly elliptic, 3.5-14 × 2-3 cm, base narrowed, apex acute to obtuse, veins 5-7. Stem leaves sessile or with connate short petioles; leaf blade lanceolate to narrowly elliptic, 1.5-10 × 0.5-1.8 cm, base obtuse to rounded, apex obtuse, midvein distinct. Inflorescences paniculate or racemelike. Flowers 5merous. Calyx lobes lanceolate to ovate-lanceolate, 7-10 mm, margin narrow, white or pale blue, and membranous, apex acute, veins 3-5 outside. Corolla pale blue to pale blue gray, 1.4-1.6 cm in diam., tube 1.5-2 mm; lobes lanceolate to elliptic-lanceolate, (1-)1.3-1.5 cm, to 1.9 cm in fruit, margin erose, apex obtuse. Nectaries 2 per corolla lobe, cupular, with pilose fimbriae 2-2.5 mm. Filaments 8-9 mm, base few barbate; anthers blue, narrowly ellipsoid, 2.5-3 mm. Style indistinct; stigma lobes suborbicular. Capsules ovoid-ellipsoid, 1.2-1.5 cm. Seeds dark brown, broadly ellipsoid, 1.3-1.6 mm, longitudinally rugose. Fl. and fr. Jul-Sep.
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