Campanula portenschlagiana, the wall bellflower, is a species of flowering plant in the family Campanulaceae, native to Croatia. It is a vigorous, low-growing, mound-forming evergreen perennial with deep purple flowers in summer.
Campanula portenschlagiana, commonly known as Dalmatian bellflower, is a dense, rhizomatous, mat-forming, deciduous perennial that typically grows to 3-6” tall, but spreads rapidly as a ground cover to as much as 24” wide. It is native to southern Europe (Dalmatian Mountains of Croatia and Herzegovina). Small, triangular, medium to dark green leaves (1-2” long) are round to heart-shaped with toothed margins. Bell to cup-shaped purple flowers (.75 to 1.0” diameter) cover the plant in late spring to late summer (sometimes early fall). Genus name comes from the Latin campana meaning bell in reference to the bell-shaped flowers.