Polyanthus perennial herbs. Stem erect, tall. Cauline leaves are long-stalked proximally, sessile distally, and all leaf margins are acutely serrate. Flowers several in a head. Calyx lobes subulate; corolla purple, blue-purple, or blue, tubular-campanulate. Capsule obovate-conic. Seeds oblong-conical, compressed. Flowering period July-September. Growth habit
Polygonum bellflower prefers cool summers and mild winters, light environment, can tolerate semi-shade. Pictures of Polyanthus