XVIU INTRODUCTION. 



greater or less length by Hooker and Arnott; 

 Mrs. Lankester, in Syme's ed. of ' English Botany ; ' 

 and Dr. Hooker, in ' The Student's Flora ; ' but the 

 old substantive names, that are now used as specific 

 ones, are not, so far as I am aware, explained in any 

 modern English book. M. Theis, in his ' Glossaire 

 de Botanique ou Dictionnaire Etymologique ' (Paris, 

 1810), gives great store of information, which has 

 much of it been often reproduced. I have given the 

 names of authorities as the necessity occurs, in pre- 

 ference to giving a list of authors quoted. 



