soils

De Vere, N. (2007) Biological Flora of the British Isles: Cirsium dissectum (L.) Hill (Cirsium tuberosum (L.) All. subsp. anglicum (Lam.) Bonnier; Cnicus pratensis (Huds.) Willd., non Lam.; Cirsium anglicum (Lam.) DC.). Journal of Ecology, 95, 876–894.

Hipkin, C.R. & Facey, P.D. (2009) Biological Flora of the British Isles: Coincya monensis (L.) Greuter & Burdet ssp. monensis (Rhyncosinapis monensis (L.) Dandy ex A.R. Clapham) and ssp. cheiranthos (Vill.) Aedo, Leadley & Muñoz Garm. (Rhyncosinapis cheiranthos (Vill.) Dandy). Journal of Ecology, 97, 1101–1116.

Thomas, P.A., El-Barghathi, M. & Polwart, A. (2007) Biological Flora of the British Isles: Juniperus communis L. Journal of Ecology, 95, 1404–1440.