Annuals, 15-30 cm tall, glabrous or sparsely pilose. Primary root short; fibrous roots clustered. Stems 1 to numerous, ascending, not creeping. Basal leaves rosulate; petiole as long as leaf blade, broadly winged; leaf blade oblong-spatulate, 2.5-4.5 cm including petiole, papery, base tapering, margin crenate and sometimes entire near base or 1-3-toothed on each side. Stem leaves opposite, 2-4 pairs; petiole short; leaf blade similar to basal leaves, ca. 1/2 as long. Racemes to 20 cm, 6-20-flowered; bracts ovate-lanceolate, 2.5-3.5 mm. Pedicel to 1.5 cm. Calyx broadly campanulate, less than 3.5 mm, to 7 mm in fruit; lobes broadly ovate, equalling tube in length, apex acute. Corolla blue-purple, ca. 1 cm; lower lip lobes broadly ovate, exserted; upper lip lobes oblong-ovate. Ovary glabrous. Capsule globose. Fl. and fr. Apr-May.
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