The UK contains around 1,500 species of flowering plants, approximately half of which can be found in the southwest, where the varied landscapes and geology give rise to a greater variety of habitats than most other regions, including acidic, neutral and calcareous grasslands, bogs, fens and saltmarsh, mountains, heath, woodland and sand dunes. Some areas of particularly high species diversity are the Cotswolds, the Mendip Hills, the coasts of Devon and Somerset, the Gower Peninsula, the Wye Valley, and the chalk downlands of Wiltshire and Dorset.