Perennial from a slender, creeping, woody rhizome; stems few, usually erect, up to 4 dm high, puberulent throughout, glandular above; leaves entire, the lower ovate, the upper lanceolate, thin, minutely puberulent, amplexical, the upper sessile, the lower on slender winged petioles; inflorescence a short interrupted thryse; flowers on pedicels 1 cm long or less; peduncles and pedicels glandular; calyx glandular-pubescent, lobes green, linear-lanceolate, separate almost to base; corolla funnelform, not gibbous, two-lipped, up to 17 mm long, basal one-third of corolla tube light blue-purple, exterior somewhat glandular-pubescent, apical two-thirds white with deep purple veins, lobes darker blue-purple, side lobes of the lower lip diverging about 45, lower lip white tomentose within; anthers not explanate; staminode not or slightly exserted, not expanded at the apex, and with a heavy golden beard up to its length. Flowers July and August.