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Forestry 1958 31(2):132-146; doi:10.1093/forestry/31.2.132
© 1958 by Institute of Chartered Foresters
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STUDIES ON ULMUS

II. The Village Elms of Southern Cambridgeshire

R. H. RICHENS

Commonwealth Bureau of Plant Breeding and Genetics Cambridge

In continuation of a preliminary study on the range of variation of East Anglian elms (Watsonia, iii (1955), a taxonomic survey was made of the village elms of southern Cambridgeshire. The number of samples collected was 132. For each of these, 8 quantitative and 1 qualitative character were measured. The samples could be classified into 7 biometrically defined groups, 6 pertaining to U. carpinifolia and 1 to U. procera. The two species are linked by intermediate forms.

At least two introductions of U. carpinifolia into Cambridgeshire seem to have occurred, one of which appears to have been no later than Roman. U. procera was introduced no later than in the Middle Ages.


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