Perennial; stems several from woody, thickened crown and short rootstock, 1-3 dm tall, simple or branched, more or less decumbent at base, densely pubescent and glandular throughout; leaves (2)3-6 cm long, 4-14 mm wide; stem leaves very numerous, the upper lanceolate to elliptic, sessile; lower leaves petioled to subsessile and oblanceolate; flowers few, 1 or 2(3) per node; upper flowers on pedicels 5-30 mm long (longer pedicels often bracteate); lower flowers often at tips of elongate axillary branches bearing 1-5 pairs of slightly reduced leaves; calyx (12)16-20 mm long, tubular, glandular-pilose, teeth acuminate, 4-6 mm long; corolla whitish, claws much exserted, 8-13 mm long, broadened above but without auricles, blades much broadened, 5-8 mm long, sometimes bilobed 1/3-1/2 their length, 2 main lobes each laciniately 3-4-lobed or cleft into pointed appendages; carpophore (stipe below ovary) 3-6 mm long, glabrous or very minutely puberulent; stamens about equal to calyx; styles 3, included; fruit a capsule. Flowers mid July to October.