Perennial herb, up to 0.3 m high; usually branched from somewhat woody base; stems subglabrous or with some short stiff hairs and gland dots. Leaves sessile or subsessile, finely pinnatifid or pinnatisect, 40-60 mm long, with 4-6 pairs of short narrow irregularly dentate lateral segments and a slightly larger terminal segment; subglabrous. Inflorescence simple; verticillasters several to many, spaced below, denser above, each 4-6-flowered. Flowers pale blue and white. Calyx ± 9 mm long; sparingly hispidulous, gland-dotted. Corolla: tube up to 14 mm long, widening at throat; upper lip 7-8 mm long; lower lip somewhat deflexed and longer. Flowering time Feb.?.