204 



THE FLORA OF HALIFAX 



When the latter flora was published the number of Hep- 

 atics given for the Riding was 108. The present list contains 

 70 for the parish and includes one new to Yorkshire, three to 

 the West Riding, and five to the Calder drainage area. Prob- 

 ably this number will be added to by future investigators. 

 The district being largely subalpine, with great stretches of 

 wet moorland, and many moist, wooded doughs, is very suitable 

 for this class of plant. 



I have adopted the classification and terminology used by 

 W. H. Pearson in his finely illustrated work "The Hepaticae 

 of the British Isles," (Lovell Reeve & Co., 1899- 1902). 

 This has been done the more readily because Pearson's great 

 work is likely to be the standard one, for many years to come, 

 in this branch of systematic botany. Symes M. Macvicars' 

 very useful " Key to the British Hepaticae " is on the same 

 lines. The arrangement differs a little from that of preceding 

 floras, and from the London Catalogue of British Mosses and 

 Hepaticae, 1881, also from Canon Lett's Hepatics of the 

 British Islands, 1902. 



My thanks are due to Messrs. M. B. Slater, Malton, W. 

 H. Pearson, Manchester, and S. M. Macvicar, Invermoidart, 

 for kind aid in determining critical species; and to Messrs. J. 

 Needham and J. T. Aspin for assistance in collecting. 



C. Crossland. 



Abbreviations and Signs Employed. 



The same as in the Moss-Flora with the following additions 



Phyt.— The Phytologist, Vol. II., 1845. 



Hist. Hudd. — C. P. Hobkirk's History of Huddersfield. 



Nat. — The Naturalist. 



Spr. Ceph. — Dr. Spruce " On Cephalozia," Malton, 1882. 



Frs. Br. Hep. — Pearson's Hepaticae of the British Isles. 



