16 



and are shewn by a marginal reference in the letter- 

 press accompanying each Class. 



The Orders of Class XIV. and XV. are character- 

 ized by the manner of producing their seed,, as shewn 

 in the two plates prefixed to those classes. 



The Orders of Class XVI. XVII. and XVIII. are 

 founded on the number of Stamina which compose 

 them. 



The Orders of Class XIX. are marked by the 

 united or separated, barren, fertile, or abortive nature 

 of the florets ; and each is illustrated in its proper 

 place. 



The Orders of Class XX. XXI. and XXII. are 

 almost entirely distinguished by the number of their 

 Stamina. 



The Orders of Class XXIII. are distinguished 

 upon the principles of the two preceding classes, and 

 being three, are called Monoecia, Dioecia, Trioecia. 



The Orders of Class XXIV. are professedly natu- 

 ral, and in the Linnaean arrangement are four; Ferns, 

 Mosses, Flags, and Fungi. 



At the top of each Plate is engraved the number 

 of the Class, and Order, and English name of the 

 plant ; and underneath its scientific or botanical name. 



At the top of each page is the botanical name of 

 the Class, and a marginal reference contains the 

 scientific name of each Order, with an English 

 explanation. 



