Annual or biennial herb. Stems decumbent or erect, branched from base, hairy, sometimes sparsely so. Lower lvs to c. 10 × 1.8 cm, oblong to oblong-lanceolate, sessile, clothed in appressed hairs, especially above, sometimes almost glabrous below; apex obtuse; upper lvs smaller. Cymes usually with bracts at base, otherwise ebracteate, elongating greatly after flowering. Pedicels becoming 1-3× length of calyx at fruiting. Calyx 1.5-3 mm long at anthesis, clothed in straight appressed hairs; teeth c. 1/2 length of tube at anthesis, to c. 4 mm long at fruiting, triangular-ovate, subacute to acute. Corolla limb 2-5 mm diam., ± flat; lobes blue (pink in bud), rounded. Style ± = or < calyx tube. Nutlets 1.2-1.5 × 1-1.2 mm, ovoid, dark brown or olive brown, glossy; rim faint.