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WATSON (H. C.) Topographical Botany. Thames Ditton, 1873-4. 2 vols. 



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WATSON (P. W.) DENDROLOGIA BRITANNICA. London, 1825. 



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WEBB AND COLEMAN. Flora Hertfordiensis. London, 1848-51. 4 parts 

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WEBSTER (A. D.) Native Trees and Shrubs of Carnarvonshire. 8vo, is. 



WEST (W.) Additions to the Algae of West Yorkshire. 1889. 8vo, is. 



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A Contribution to the Fresh-water Algae of West Ireland. London, 



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WETHERED (E.) Carboniferous Flora of the Bristol Coal Field. Glou- 

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WHITEHEAD (J.) Flora of Ashton-under-Lyne. 1888. 8vo, cloth, 2s. 



WHITWELL (W.) West Yorkshire Records and Notes. 1893. 8vo, is. 



WILKIE (T.) Remarkable Trees on the Estate of Ardkinglas, Argyleshire. 

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WILKINSON (H. J.) British Plants in the Herbarium of the Yorks. Phil. 

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WITHERING (W.) An Arrangement of British Plants. Third edition. 

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WILLIAMS (B. S.) Hints on the Cultivation of British and Exotic Ferns 

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WILLIAMSON (W. C.) On the Organization of the Fossil Plants of the 

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