Perennial herb, 3-5 dm tall; herbage glaucous, glabrous; stems ascending to erect, 1-few; leaves 2-11 cm long, 5-30 mm wide, fleshy, entire, the basal and lower stem leaves petiolate, spatulate, the upper leaves sessile, ovate to lanceolate; inflorescence of 4-8 well spaced pairs of cymes (verticillasters), occasionally somewhat congested, glabrous; cymes 1-3 flowered, secund, relatively loose with elongate peduncles and pedicels; calyx 4-8 mm long, glabrous; corolla 17-23 mm long, lavender to blue-violet or white, guidelines absent or obscure; stamens included or reaching the orifice; staminode included or reaching the orifice, bearded distally with yellow hairs. Flowers May and June.