The pine was eagerly introduced in the mid-19th century, but has proved an ecological disaster as it invades the chestnut groves, advancing up the slopes to take over the heathland pastures, blotting out the ecological niches for wildlife.
Cherry and snowy white Amelanchier trees are a colourful spring spectacle on the limestone slopes, and the vivid yellow and lime greens of several maple species in early spring is matched only by their brilliant golds and reds come the autumn. The occasional aging mulberry tree bears witness to the former thriving silk trade that enriched the area.