A perennial clump forming helianthus that is non-invasive and so doesn't spread everywhere. The flowers are a lemon/primrose yellow borne on 6 - 8 foot high stems. Popular with hoverflies and bees, and ideal in a naturalistic planting of grasses and herbaceous perennials. It has the added bonus that the stems go a rich mahogany brown colour in late autumn, darkening down to almost black throughout winter.