Crocosmia

Crocosmias are pretty summer perennials that grow from corms. When properly mulched, they are hardy to Zone 5.

The flowers vary in height and can grow quite tall. Mine needed staking.

A native of South Africa, this plant was, according to Canadian Gardening, popular in the Victorian era.

Amazingly, in the Blue Mountains of Australia, it is called by its other name, montbretia, and classified as a noxious weed.