Epipactis helleborine
This site includes the Ashen Copse Nature Conservation Review site. This site is a large, ancient, semi-natural, broadleaved woodland with a predominantly high forest structure which is unusual in South West Britain. Over the majority of the site, where soils are poorly drained but not waterlogged, the major canopy-forming tree is pedunculate oak ("Quercus robur"), with ash ("Fraxinus excelsior") being locally common and distributed throughout. Hazel ("Corylus avellana") is the commonest shrub and occurs throughout. Many plant species normally found only in ancient woodlands occur, including broad-leaved helleborine ("Epipactis helleborine") and wood small-reed ("Calamagrostis epigejos"). One of the largest plantations of coast redwoods ("sequoia sempervirens") in Britain is also located here, mostly within the grounds of Center Parcs Longleat. These grounds are also home to the U.K.'s tallest giant redwood ("sequoiadendron giganteum").