PREFACE. 



De Candolle as followed by Balfour, In the Catalogue the topogra- 

 phical arrangement is not indicated, except by inference. I have not, 

 however, in all the classes confined myself to enlarging only on local 

 products, and to instancing the chief foreign products. The drugs 

 of an Indian Bazaar are one-half foreign, but I have catalogued 

 each one prominently. On the other hand I have avoided the 

 mention of drugs unknown to the natives of India. Under the 

 Class of Woods I have specified only the best known foreign 

 woods, and under the Miscellaneous Class, no foreign article. 

 The reasons for the exceptions to the rule in the treatment of 

 these and other classes are obvious. 



Under the Economic Classes, the natural orders are not num- 

 bered in the sequence they assume in these, which would give each 

 order a different number in almost every Class, but according to their 

 numbers in Balfour. This will avoid all confusion in turning from 

 Class to Class, and facilitates reference from one to the other, 

 and from all to Balfour, or any other work on the system of 

 De Candolle. Moreover, an appreciation of the mutual relation of the 

 natural orders, and the discrimination of such as are economic, from 

 such as are not, is unconsciously taught. To aid references to works 

 on the system followed by Lindley, a table is prefixed to the 

 Catalogue, showing the numbers of the orders in Lindley corre- 

 sponding with those in Balfour. 



In nearly every instance the authority for the scientific names of 

 each plant is given, and English names are only added when 

 authorized by Loudon. The plants with English names, therefore, 

 are those which have been introduced into Britain. The initial of 

 the specific Latin name is invariably a small letter, as : 



Mangifera indica, 



Vitis vinifera, 



Dracocephalum royleanum ; 

 except in cases in which the specific name was once generic, as : 



Trichosanthes Anguina ; 



and I have considered as generic not only old scientific names, but 

 the names used by the Greeks and Romans, and writers of the 

 Latino-barbaric ages, as : 



Balsamodendron Myrrha, 



