kids encyclopedia robot

Purn Hill facts for kids

Kids Encyclopedia Facts
Quick facts for kids
Purn Hill
Site of Special Scientific Interest
Purn Hill.jpg
Area of Search Avon
Coordinates 51°18′40″N 2°57′32″W / 51.311°N 2.959°W / 51.311; -2.959
Interest Biological
Area 6.1 hectares (0.061 km2; 0.024 sq mi)
Notification 1990 (1990)

Purn Hill is a 6.1 hectare biological Site of Special Scientific Interest near the village of Bleadon, Somerset, notified in 1990. The site is a small promontory of Carboniferous Limestone projecting southward from the main Mendip ridge.

The SSSI citation sheet describes the site as having an "exceptionally diverse unimproved calcareous grassland flora". The richest grassland communities are situated on the thin and stony soils of the steeper west-facing flanks of the hill. Over 200 species occur in the sward, including Salad Burnet (Sanguisorba minor), Dropwort (Filipendula vulgaris), Fairy Flax (Linum catharticum), Kidney Vetch (Anthyllis vulneraria) and Dwarf Thistle (Cirsium acaule). The rare plants are mainly associated with the small exposures of dolomitic limestone in the southern part of the site. Purn Hill is one of only five British sites for the nationally rare coastal limestone umbellifer species Honewort (Trinia glauca). White Rock-rose (Helianthemum apenninum) is found at the site and hybridises with Common Rock-rose (Helianthemum nummularium) to form the hybrid H. x sulphureum. Forty species of grass occur at the site, including Somerset Hair-grass (Koeleria vallesiana) which in Britain is confined to the western Mendips. Musk Stork's-bill (Erodium moschatum) occurs here.

The Mendip Way crosses the site.

kids search engine
Purn Hill Facts for Kids. Kiddle Encyclopedia.