IV. EXPLANATORY NOTE. 



late Mr. William Sanders in his geological " Map of the Bristol 

 Coal-fields and country adjacent." It extends to different 

 distances in different directions. In a northerly and north- 

 easterly direction it includes Berkelej', Diirsley, and Wotton- 

 under-Eilge ; south-eastward, it takes in Bath ; southward, 

 Shepton Mallet and Wells ; while in a south-westerly direction 

 it reaches as far as Huntspill, which is twenty-four miles 

 distant from Bristol. Altogether, it comprises (roughly) about 

 700 square miles. 



A work embracing so large an area, and the preparation of 

 which has extended over so short a time, must necessarily be 

 incomplete, especially in its earlier portions. It is believed, 

 however, that it will be found to be accurate. 



It is intended that a portion of the work shall be published 

 with each annual Part of the Proceedings of the Society 

 until it is complete. The instalment now presented contains 

 Thalamiflorals ; the second will contain Calyciflorals ; the third, 

 Corolliflorals ; the fourth, Apetalous Plants : and the fifth and 

 last, Endogens, Gymnosperms, and Vascular Cryptogams. 



The arrangement and nomenclature used are almost entirely 

 those adopted by I'rofessor Babington in the seventh edition of 

 his "Manual of British Botany." 



Although bound up with the Proceedings, the Flora will be 

 paged independently, with a view to the ultimate collection of 

 the several parts into a single volume. 



The help of botanists residing within the district is solicited, 

 that the work may be as complete as possible. Information of 

 omissions in any published part will be gladly received by the 

 Editor, and will be recorded in a supplementary list. 



Certain abbreviations used in the Flora require explanation. 

 The capital letters G. and S. indicate the counties of Gloucester 

 and Somerset respectively. The lioman numerals denote the 

 months in which the plants have been found in flower. 



.Ttine, 1881. 



