LVniODUCTlOX TO BOTAXY. - lix 



We subjoin a list of those natural families, or groups, 

 chiefly according to ilicbard, which occur in the Flora of 

 Oxfordshire, and its contiguous counties. The Genera 

 arranged under each family are also given. For the charac- 

 ters of the diflterent fiimilies or groups, we refer the student to 

 Richard by Clinton, or by Macgillivray, or to Lindley's In- 

 troduction, or to Sir James Smith's Grammar of Botany, or to 

 De Candolle's Botanicon Gallicon, a work in Latin. 



DIVISION I. 



The Inembryonate Plants, or Acotyledons, 



Including the algse, or sea-weeds, and conferva?, funguses, 

 lichens, hcpaticaCj mosses, ferns, and some other cryptogamic 

 classes, do not belong to our subject, except the tenth family 

 of Characca3. 



1. Chara genus and its species. 



DIVISION II. 



Emhryonated, or fiO'xering plaiits, that is, plants furnislied 

 with stamens, and pistils. According to the structure of the 

 embryo, these are divided into two groups, the monocotyledo- 

 710US, and the dicotyledonous. 



Monocotyledonous Plants, 



Besides the embryo being monocotyledonous, it is to be 

 observed that in this division of plants, the internal structure of 

 the stem is composed of cellular tissue, in which are scattered 

 vasicular bundles; the nerves of the leaves in general, are 

 parallel ; the perianth is a calyx only, sometimes coloured, 

 (according to Jussieu,) like petals; the floral organs, are in 

 general three, or a multiple of three; in the dicotyledons, the 

 number five prevails. 



CLASS II. 



Monohypogyny, (that is, monocotyledonous, and liypogy- 



nous.) 



