ARRANGEMENT OF THE GENERA 



OP 



BRITISH PLANTS, 



ACCORDING TO THE NATURAL METHOD. 



IN attempting to arrange plants agreeably to their natural 

 affinities, various methods have been devised. That here used, 

 although partly artificial, will answer the purpose of grouping 

 the British genera into Families, or, as these groups are now 

 frequently called, Orders. It not being consistent with the 

 plan of this work to present details, the following Table will 

 be found to be merely the outline of an arrangement- 



Plants may be primarily divided into two series : 1. VASCU- 

 LAR, or FLOWERING PLANTS ; 2. CELLULAR, or FLOWERLESS. 

 These Sections of the vegetable kingdom may be subdivided 

 into Classes, Orders, and Genera. Thus : 



SERIES I. VASCULAR PLANTS. 



Also named FLOWERING Plants, and PH^NOGAMOUS Plants. 



Plants producing flowers and seeds, and composed of cellular 

 tissue, woody fibre, and spiral vessels. 



Class I. DICOTYLEDONOUS PLANTS. 



Stem formed of pith, wood, and bark ; the woody part fur- 

 nished with medullary rays, and increasing by the addition of 

 layers externally; whence these plants are also named EXO- 

 GENOUS ; cotyledons two or more, opposite. 



Section I. THALAMIFLOR.E. 



Petals distinct, and, with the stamens, hypogynous (inserted 

 beneath the ovary). 



Order I. RANUNCULACE,E. 



Sepals five, three, or six. Petals five, or more, or none. Stamens 



