THE FLORA OF HALIFAX. 149 



represents some characteristic feature connected with the plant 

 itself, or its habitat : — Andrea crassi-nevva = thick nerved 

 Andrea ; Bryum argenteum = silvery Bryum ; Bryum alpinum 

 = Alpine or mountain Bryum, etc. Most of them are at once 

 apparent and suggestive, and answer all purposes. In works 

 where so called popular names are added, they are mere 

 translations of the technical terms, so we do not propose to 

 encumber the list with them. 



Short explanatory or critical notes are added to many of 

 the records when deemed necessary, or considered of sufficient 

 value or interest. 



Observations on local distribution and moss-associations 

 are deferred until the completion of the list. 



Geographical distribution throughout Britain, has not yet 

 been worked out and analysed so elaborately as that of the 

 flowering plants and ferns. This lack of information renders 

 it impossible to give a census number under each species to 

 indicate whether it is wide spread, or is confined to one, or a 

 few limited areas. 



Among the mosses there are few, if any, denizens or aliens 

 to deal with. One stranger though has recently appeared. 

 Last year (1900) Mr. Needham gathered Ulota phyllantha near 

 the bobbin-turning works of Messrs. Roberts and Hirst, Cote 

 Hill, Warley. It was on an ash-tree trunk brought from 

 Ireland, and was still living and vigorous. 



When any doubt has been felt regarding the identity of any 

 species, either old or recently gathered, the specimen has been 

 submitted to some experienced bryologist for his opinion. 

 Occasionally two authorities have been consulted respecting 

 the same species. I have to thank Dr. R. Braithwaite, 

 F.R.M.S., London ; the Rev. H. N. Dixon, M.A., North- 

 ampton ; Mr. M. B. Slater, J. P., Malton ; Mr. E. C. Horrell, 

 F.L.S., London ; and Mr. J. H. Wheldon, F.L.S., Liverpool ; 

 for kindly assisting in the determination of critical species ; also 

 Mr. J. Needham, of Hebden Bridge; Mr. J. T. Aspin, of 

 Halifax, and others, for the great assistance they have 

 rendered to the w T ork in collecting mosses in the district. 

 Specimens representative of all recent records, with only two 

 or three exceptions, are in my own herbarium. 



