CHAPTER V. 



Plan of the Flora. 



THE Flora (pages 1-144) is arranged in accordance with 

 the ninth edition (1895) °* : tne " London Catalogue of 

 British Plants." 



i. — The botanical name (as given in the Catalogue, with 

 one or two exceptions) is placed first in heavy type, and after 

 it the authority for the name, in the usual abbreviated form 

 (e.g., L. = Linneus). When the plant is an alien, its name is 

 printed in italics. Entries of species which are considered to 

 be now extinct, or to have been erroneously recorded, are 

 placed within square brackets ] . 



ii. — The 'census number' that follows each name indicates 

 in how many Watsonian vice-counties the plant is found in a 

 native or quasi-native state. In order to arrive at a more 

 exact knowledge of the distribution of British plants, H. C. 

 Watson divided Great Britain into 112 botanical areas (vice- 

 counties) more uniform in size than the counties. Yorkshire 

 includes five of these vice-counties, and the whole of the 

 parish of Halifax lies in No. 63. The census numbers (revised 

 to 1895) therefore show at a glance the comparative frequency 

 or rarity of each plant in Great Britain ; the maximum being, 

 of course, 112. 



iii. — As there were many changes made in the names of 

 species in the ninth edition of the Catalogue, it has been 

 necessary to add in some cases the more familiar ones employed 

 in Hooker's ' Student's Flora.' These synonyms come next, 

 and are printed in ordinary type, to avoid confusion with aliens, 

 printed in italics. As this objection does not apply in Mr. 

 Crossland's section, synonyms are there printed in italics, from 

 page 151 onwards. 



iv. — The English names that follow are those in common 

 use, either by collectors or more generally, and they include a 

 few local names. 



v. — The status of the plants, or their rank of citizenship, is 

 given at the commencement of the second line. To determine 

 this is often a problem of the greatest difficulty, and whilst 



