Plants perennial. Rhizomes creeping, black. Stem usually single or few, erect, 20-45 cm tall, sparsely short strigose, branched at apex; stem leaves oblong-lanceolate to lanceolate, 2.5-6 cm × 7-10 mm, sparsely short strigose or glabrescent, base narrowly cuneate, decurrent on a short narrowly winged petiole, apex acute. Inflorescences terminal on stems and branches, to 15 cm in fruit, reclinate, bracteate only at base. Pedicel ca. 5 mm, to 1 cm in fruit, recurved, rarely horizontal. Calyx lobes narrowly elliptic, ca. 1.5 mm, to 4-5 mm in fruit, sparsely short strigose, apex acute. Corolla light blue; tube ca. 1.8 mm; throat appendages short hairy, apex retuse; limb ca. 6 mm wide; lobes divaricate, broadly ovate, ca. 2.5 mm. Anthers elliptic, ca. 0.6 mm, base subcordate, apex obtuse. Nutlets dark brown, oblique subulate, trigonous-tetrahedral, shiny, glabrous, sessile, adaxial bottom surface smaller than 2 subequal lateral surfaces, margin narrowly ribbed, apex acute; abaxial surfaces flat or slightly concave, triangular, ca. 2 mm. Fl. and fr. Jul-Aug.
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