Résumé :
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Providing an update of the classic "Student's Handbook" by S.M. Macvicar (1926), this illustrated account of the 300 liverwort and hornwort species on the British and Irish lists is a synthesis of nearly 40 years' study. The detailed descriptions and figures, all prepared by the author, are designed to enable students of these groups to determine the morphologically variable specimens that cause so much difficulty in identification.;The book is intended for both the amateur and professional bryologist, whether beginner or experienced, and contains an introduction to the Hepaticae and Anthocerotae, with information on their morphology, ecology and distribution. It also provides advice on collection and examination. The extensive illustrated systematic section contains dichotomous keys to orders, genera and species. The British Isles has one of the best known bryophyte floras in Europe, and the richness of the liverwort flora in western oceanic regions of Britain and Ireland is of worldwide significance. Nevertheless the extreme variability of many of the species has made identification notoriously difficult. This work is intended to enable both the amateur, whether beginner or more experienced, and the professional bryologist to determine the morphologically variable species more readily. The Introduction comprises sections on collection and preservation; measurements; examination of material; habitats and distribution; conservation; function and use of keys; explanation of text; abbreviations and symbols used in the text; explanation of figures; and abbreviations and symbols used in the figures. The Systematic Section begins with a conspectus of classification followed by the accounts of genera with keys, and of species, each copiously illustrated in meticulous detail by the author. The work concludes with a glossary; a list of vice-counties in the British Isles with a map; the bibliography and the index.
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