Herbs annual or biennial, rarely perennial, green, 15-25 cm tall, densely appressed pubescent, sparsely hispid. Stems single or several, cespitose, erect to ascending, branched from base; branches extremely crowded. Leaves sessile, lanceolate or oblanceolate, 1-3 cm × 3-6 mm, abaxially densely strigose, margin and midvein hispid, adaxially hispid and strigose, base cuneate, apex obtuse. Inflorescences numerous, terminal, to 4-6 cm after anthesis, becoming racemose; bracts ovate-lanceolate, 3-7 mm. Pedicel 1-3 mm, densely spreading hispid. Flowers crowded. Calyx 5-8 mm, parted nearly to base; lobes lanceolate. Corolla blue, tubular-campanulate, 0.8-1.2 cm; throat 4-9 mm wide; nectary obscurely pubescent; lobes broadly triangular, short appressed pubescent, otherwise obscurely pubescent outside, glabrous inside except for nectary, margin revolute. Filaments 6.5-7 mm, decurrent part linear, inserted 3.4-4 mm above base in corolla tube, mealy pubescent; anthers laterally united, 5-6 mm, mostly or completely exserted. Nutlets light yellow-brown, 2-2.5 mm, shiny, sparsely tuberculate, obscurely wrinkled. Fl. and fr. Aug-Sep.
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