These pretty perennials are natives of North America. They are great plants for the herbaceous border and they provide beautiful flowers for cutting. The height of the varieties range from 3 to 5 feet. H. helianthoides variety scabra Sommersonne forms clumps of dark green, oval to lance-shaped, toothed leaves. In late summer, tons of large, single ... Found on http://www.encyclo.co.uk/local/10004