Perennials, 30-50 cm tall. Stems often cespitose, sometimes sterile, often many branched from middle or apically, glabrous. Leaves alternate; leaf blade linear, 2-5 cm X 2-3 mm, glabrous. Inflorescences spicate, with several to numerous flowers, elongated in fruit, axis and pedicels glabrous. Calyx glabrous or sparsely with short glandular hairs; lobes narrowly oblong to ovate-lanceolate, 2-3 X 1.2-2 mm. Corolla purple, 1.2-1.5 cm (excluding spur); spur straight, 1-1.5 cm; lateral lobes of lower lip ca. 1 mm; upper lip ovate-triangular, longer than lower lip. Capsule subglobose, 5-7 X 4-5 mm. Seeds disclike, margin broadly winged, center smooth. Fl. May-Aug.