soils

Jefferson, R.G. (2008) Biological Flora of the British Isles: Mercurialis perennis L. Journal of Ecology, 96, 386–412.

Jacquemyn, H., Brys, R., Honnay, O. & Hutchings, M.J. (2009) Biological Flora of the British Isles: Orchis mascula (L.) L. Journal of Ecology, 97, 360–377.

Jacquemyn, H., Brys, R. & Hutchings, M.J. (2008) Biological Flora of the British Isles: Paris quadrifolia L. Journal of Ecology, 96, 833–844.