xii INTRODUCTION 



as possible before leaving the family. This is easily managed in dealing 

 with the outdoor collection in our botanic gardens. 



No particular attempt is made in the book to avoid technical terms. 

 When a term or abbreviation is used that the reader does not understand 

 he should look it up in the Dictionary, or under Abbreviations. 



To save space, in many cases in which there are several words in use 

 beginning with the same prefix, e.g. aniso-, apo-, endo-, epi-, geo-, 

 gyno-, halo-, heter-, iso-, phyllo-, poly-, sym-, xero-, &c., all are given 

 under the heading of the prefix. If a word is looked up as a whole, there- 

 fore, and not found, reference should be made to the prefix before saying 

 that it is omitted from the Dictionary. 



Many genera are described by different authors under different 

 spellings, and the most common and important of such cases are in- 

 cluded ; thus Prunella is also described under Brunella, Eleocharis 

 also under Heleocharis, c. 



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