136 THE LICHENS OF SOUTH LANCASHIRE. 
23. Watson, Н. С. 
Topographical Botany, ed. 2 (1883). 
24. WHELDON, J. A. 
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рр. 81-83. 
25. WHELDON, J. A., and W. (+. Travis. 
“А New Lancashire Lichen,” in Lane. Naturalist, vi. (1913) p. 324. 
26. WHELDON, J. A., and А. WILSON. 
The Flora of West Lancashire. (1907.) 
27. WILSON, А. 
“The Great Smoke-Cloud of the North of England and its Influence 
on Plants,” in Rep. Brit. Assoc. (Bradford) 1900, pp. 930-931. 
See also under WHELDON, J. A. 
28. WITHERING, W. 
A Botanical Arrangement of British Plants &c., ed. 3 (1796) ; ed. 4 
(1801). 
