Soft perennial, 100-400 mm tall, dichotomously much-branched from a softly hairy base. Leaves alternate, thin-textured, petiolate, ovate, glabrous, unequally and coarsely serrate, lanceolate in upper parts. Flowers long-pedicellate, funnel-shaped, bright blue to purple, filaments narrowly pear-shaped at base, ovary 3-locular. Capsule ovoid, as long as calyx lobes.