Contrasting Vegetational Histories of Certain Soils in South Wales

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Abstract
Non-tree pollens such as the Gramineae and Ericaceae, and the pteridophyte spores (chiefly Polypodium) assume major importance in soils of the highland zone of South Wales. Early open woodland with ferns gave way to a flora dominated by Ericaceae and then the grasses. At lower elevation, in the Gower Peninsula, the Ericaceae do not play a major part in the vegetational record. Approaching the Vale of Glamorgan and entering an area dominated by calcareous soils, tree pollen assumes a more important role, and the Gramineae and pteridophytes become much less important. In the Vale oak has dominated thick forest throughout the time represented by the pollen distribution in soil profiles.

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