An unusual Tansy Tanacetum vulgare plant at Newton-on-Ouse, North Yorkshire

摘要

Tansy Tanacetum vulgare is a widespread species in the British Isles (BSBI, 2016) and is particularly abundant along stretches of the Yorkshire Ouse, where it serves as the major food plant for the endangered Tansy Beetle Chrysolina graminis (Oxford et al. 2003). In August 2015, while surveying for Tansy Beetles, a Tansy plant with a curious morphology was discovered near Newton-on-Ouse (SE513588). The plant comprised 21 flowering stems emerging from what seemed to be a single root-stock. It was growing next to a patch of normal Tansy and was of identical height (approx. 120 cm).