The larvae feed on Pimpinella saxifraga, Ferula communis, Laserpitium species, as well as on the flowers and unripe fruits of Seseli arenarium.
Located on London Clay, it has many flowers typical of clay pasture, such as greater bird's-foot-trefoil and burnet-saxifrage.
Saxifraga | Pimpinella saxifraga | Saxifraga mertensiana | A larval web in an inflorescence of ''Pimpinella saxifraga |
The main species in the plant communities here are Upright brome (Bromus erectus), Sheep's Fescue (Festuca ovina), Quaking-grass (Briza media), and downland herbs such as Burnet-saxifrage (Pimpinella saxifraga), Salad-burnet (Sanguisorba minor), Common Milkwort (Polygala vulgaris) and Dwarf Thistle (Cirsium acaule).