A herbaceous perennial grown mainly for the foliage effect, it does however have attractive flowers. Foliage emerges in early spring from swollen roots. Colour is rich green throughout and being maybe slightly broader than some. Flowers are borne in mid summer on rigid stems, each stems carries numerous flowers of a tubular shape. Colour is lavender-purple and these are followed by green seed pods. Very small and similar to Kew form etc.