A plant variety of the Campanulaceae family, having the varietal designation `Thor Heaven`, with a spreading growth habit and large campanulate, actinomrphic flowers. Leaves are alternate and whorled and fairly small with serrate edges and winged stipules. Mature leaves look like arrowheads. The mature perianth tube is R.H.S. 91 C,D to 92 C (violet-blue group), with dark spots of R.H.S. 71 A (red-purple group) on the tips of the lobes of the perianth.