4 6 CRYPTOGAM I A. 



colour, and of a uniform texture throughout; They 

 grow altogether underground, at about the depth of 

 nine inches, and are found by dogs, which are of a 

 particular breed, and exclusively trained and practised 

 in the south of France and Italy to hunt for them. 



I have now enumerated the twenty-four Linnaean 

 Glasses, and all the Orders, so as to give a gene- 

 ral view of the whole system. This book may 

 be therefore considered as a Linnaean Dictionary, 

 shewing the precise situation for any plant that can 

 be found in any part of the world. When this ar- 

 rangement is understood, then the families of plants, 

 which are calied Genera, and their subdivisions into 

 Species, may be studied with more facility, and the 

 commencement of this study may be considered, in 

 reality, as the commencement of the study of Botany. 



There is nothing more important in studying 

 Botany, according to the Linnaean system, than to 

 have a clear and distinct perception, that the know- 

 ledge of classing plants by this system is of itself no 

 part of Botany ; and this I am the more desirous to 

 impress, because much error and confusion are pro- 

 duced by considering the genera and species of plants 

 as growing out of the Linnaean system of arrangement. 



The science of Botany, so called, is usually divided 



into three parts j 1st, the systematical arrangement 



of plants, with the denomination of their several kinds; 



2dly, physiology, or the knowledge of the structure 



