36 INTEODTTCTION. 



• Manual of British Botany,' and not adopted as sucli in the present work, 

 are mentioned or referred to either in these concluding observations or 

 among the synonyms immediately under the specific name. All other 

 species inserted in the above works and not included or alluded to in the 

 present one, are omitted, because they are believed not to grow wild in the 

 British Isles. 



