Stems branched from base, to 40 cm tall, strigose, sparsely short bristly below; branches erect to gradually ascending. Lower stem leaves petiolate, oblong-elliptic to linear-oblanceolate, 3-7 × 0.5-1.4 cm, base attenuate, apex acute to obtuse; upper stem leaves sessile, smaller, appressed pubescent. Inflorescences terminal or axillary; bracts narrowly elliptic, 1-3 mm; lower inflorescences frequently ebracteate. Flowers crowded, those on stem long pedicellate, at branching points opposite leaves. Calyx 2-3.5 mm, to 4 mm in fruit, sparsely appressed pubescent outside, ciliate along margin, parted nearly to base; lobes lanceolate-linear. Corolla blue or white, glabrous; tube ca. 2.2 mm; appendages low trapeziform, ca. 0.4 mm; limb 5-6 mm wide; lobes orbicular-obovate. Nutlets long turbinate, 2.5-3 mm, minutely hispid, with scattered fine tubercles and 4 longitudinal ribs; aperture orbicular, at apex of nutlets. Fl. Jul-Aug.
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