Annuals or biennials 8-40 cm tall. Stems erect, subterete, striate, branched apically. Basal leaves short petiolate; leaf blade spatulate to oblanceolate, 7-10 × 4-10 mm, base narrowed, apex obtuse, midvein distinct. Stem leaves 3-10 pairs, sessile, linear to narrowly lanceolate, 1.5-8 cm × 3-9 mm, margin slightly ciliolate, apex acuminate, midvein distinct. Pedicel erect, to 15 cm, elongated in fruit, subterete, striate. Outer calyx lobes 7-20 mm; inner calyx lobes 6-12 mm. Corolla tubular-funnelform, 2.5-5 × ca. 1.2 cm; lobes elliptic, 6-12 × 6-8 mm, margin short laciniate-fringed basally, apex rounded, denticulate, and mucronate. Nectaries suborbicular, nodding. Filaments 0.8-1.2 cm; anthers narrowly ellipsoid, ca. 3 mm. Style linear, 1-1.5 mm. Capsules as long as corolla, on a short gynophore. Seeds brown, ellipsoid, ca. 1 mm. Fl. and fr. Jul-Sep.
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