Herbs annual or biennial, diffuse, 10-25 cm tall. Stems much branched, short strigose. Basal leaves and lower stem leaves petiolate, elliptic-ovate to linear, 0.8-2 cm × 2-6 mm, short gray strigose, base cuneate, apex acute. Inflorescences terminal, lax; bracts basal only, leaflike. Pedicel usually obliquely spreading, to 5 mm. Calyx 5-parted; lobes erect, narrowly ovate to lanceolate, to 1.5 mm. Corolla light blue or white, campanulate; tube ca. 1.5 mm; throat yellow; appendages lunate; limb ca. 3 mm wide; lobes obovate, ca. 1.5 mm. Stamens included, inserted at middle of corolla tube. Nutlets dark brown, oblique subulate, trigonous-tetrahedral, 1-1.5 mm, shiny, usually glabrous, adaxial bottom surface prominent, 2 lateral surfaces equal, a longitudinal rib at their juncture; abaxial surface convex, ovate, acutely 3-ribbed; carpophore sharply curved. Fl. May-Sep, fr. Jun-Sep.
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