254 



VEGETABLE 



their structure, and by Cotyledonous, such as produce seeds 

 with Cotyledons, whether one, or more. The Cryptoga- 

 mia contain neither, their structure being cellular, and their 

 seeds without Cotyledons. 



The Cotyledonous vegetables, as a grand division, and by 

 which they are separated from the Cryptogamia, are formed 

 with cellular tissue, spiral vessels, and woody fibre ; and their 

 seeds are composed of one or more cotyledons. Fig. 225 

 represents a vertical section of a Cotyledonous stem, in 



Fig. 225. 



which are included the cellular tissue a ; the spiral vessels 

 5, and the woody fibre c. The leaves of this division are 

 traversed by veins, which either run parallel, or are reticu- 

 lated. The flowers are also perfect, that is, they contain 

 stamens and pistils, either on the same, or on separate plants, 

 which will prevent their being confounded with the Cellu- 

 lares, or Cryptogamia, which contain no visible flowers. 



THE VASCULAR, COTYLEDONOUS, OR PH^ENOGAMOUS 

 PLANTS, are separated into two great classes, called, (as we 

 have already shown,) Endogenes, or Monocotyledonous, 

 and Exogenes, or Dicotyledonous. These are distinguished 

 from each other by obvious physical properties, both with 

 respect to organic stiucture, the appearance of the leaves, 

 and the peculiarities of the seed. 



MONOCOTYLEDONOUS PLANTS. This class, we have 

 seen, stands between the Cryptogamia, and Dicotyledonia 

 With respect to internal structure, they contain both cellu 

 lar, and spiral vessels. Their seeds have only a single co- 

 tyledon, and their leaves are not reticulated, as represented 



