VI PREFACE. 



been extended to a much greater area in Yorkshire and else- 

 where : and, indeed, the first fruits of it, the ' ; Botanical Map 

 of Leeds and Halifax District," by Wm. G. Smith, Ph.D., 

 and C. E. Moss, 15. Sc., provides the one feature necessary 

 to round off the enquiry, and removes the necessity of in- 

 cluding a similar map of the parish in this work. 



The publication of the Flora was commenced as long ago 

 as [896. By issuing it as a separately-paged supplement to 

 the Halifax Naturalist, of which it was the raison d'etre, the 

 financial difficult) was solved, and at the same time the lengthy 

 period of production permitted attention to be concentrated 

 on one portion at a time, with the hope of eventually 

 including the cryptogamic flora. This has happily been 

 realised, and as was anticipated, the whole responsibility for 

 the latter has been undertaken by Mr. Crossland. His con- 

 tribution far exceeds mine in number of species, and is evidence 

 of the thoroughness with which the lower forms of vegetation 

 have been recorded in recent years in a parish inseparably 

 associated with some of the earliest work in this branch. The 

 list of Fungi in particular is quite without a parallel for any 

 equal area, and it incorporates many species previously un- 

 recorded in any British, or even any Flora. My only share in 

 the Flora, from the Mosses onwards, has been in seeing it 

 through the press. So leisurely a production required care 

 in adopting from the beginning a scheme which could be fol- 

 lowed throughout. Of necessity abbreviations have been 

 more freely employed in the latter part, but there is no 

 material deviation from the original plan, and the treatment 

 remains practically uniform. 



Apart from assistance received from the Botanical Section 

 of the Scientific Society and its individual members, and other 

 obligations acknowledged elsewhere, I am indebted for the 

 determination of critical species and other information to 

 Messrs. J. G. Baker, F.R.S., W. H. Beeby, James Brit- 

 ten, K.S.G., Rev. W. Moyle Rogers, and Prof. R. von 

 Wettstein. 



W. B. C. 



