It has tubular - bell shaped white flowers , which are 2 cm .
It is a vigorous , clump - forming perennial with heart - shaped , toothed , gray hairy basal leaves that are 3 inches long .
perennial has tubular - bell shaped white flowers , which are 2 cm .
It is a vigorous , clump - forming perennial with heart - shaped , toothed , gray hairy basal leaves that are 3 inches long .