Aconitum carmichaelii 'Kelmscott' goes by the common name, Monkshood. This beautiful late summer into fall bloomer is a long-lived perennial that does well in part shade or full sun. If well fed this plant can get six feet high. This year it is shorter since it was moved from the tennis court garden to the back of Ed's perennial border. The roots of this plant are poisonous, which makes some people not want to plant it, a pity.