English elm, Ulmus procera Salisbury
Wych elm, U. glabra Hudson
Smooth-leaved elm, U. carpinifolia Gleditsch var. carpinifolia
Cornish elm, U. carpinifolia var. cornubiensis (Weston) Rehder
Wheatley elm, U. carpinifolia var. sarniensis (Loudon) Rehder
Dutch elm, U. xhollandica Miller 'Hollandica'
Huntingdon elm, U. xhollandica Miller 'Vegeta'.
The primary features which can often be used to provide an absolute identification of a mature elm at any time of the year are the characteristic form of the crown and the colour and appearance of the bark. The shape of the leaf and the texture of the upper surface of the leaf are also important secondary features. This Booklet includes photographs, line drawings and descriptions to show these features and to help with the identification of elms in the field.