232 NATURAL 



Tribe I. AXGIOSPERM^E. 

 Seeds enclosed in a pericarp. 



This tribe includes all such plants as have two cotyled^as, 

 with their seeds enclosed in a pod, or shell, or in a coat 

 which proceeds from the germen. Ex. Pea, Chestnut, 

 Larkspur. 



This tribe is divided into Polypetahus, Apetalous, Ach- 

 lamydfous, and Mon&pctalous plants. 



A. POLYPETALOUS, (mony-petakd.) These have a calyx 

 and corolla. Ex. Rose, Crowfoot. 



B. APETALOUS, (without petals.) These have a calyx, but 

 no corolla. Ex. Blitum. 



C. ACHLAMYDEOUS. These have neither calyx nor corol- 

 la. Ex. Birch, Willow. 



D. MOXOPETALOCS. These have a single petal. Ex 

 Bignonia, (Trumpet-jlower,) Ipomea, (Morning-glory.) 



Tribe 2. GYMNOSPERM^E. 

 Seeds destitute of a pericarpium. 



The plants of this tribe have neither stigma nor style, the 

 influence of the pollen being communicated directly to the 

 seed through a foramen, or orifice. They must not be con- 

 founded with the Gymnospermae, or naked seeded plants of 

 Linnaeus, which all belong to the tribe Angiospermae of this 

 system. 



This tribe is divided into Coniferc, and Cycadea. 



COXIFERJE. The Fir tribe. Ex. Pine, Juniper. 



CYCADJE. Ex. Cycas, Zamia. 



SUB-CLASS 2. ENDOGENJE, OR MONOCOTYLEDON ocs PLANTS. 

 Leaves with parallel veins. Stem with no distinction of wood* 



bark and pith. Flowers chiefly with a ternary division. 



Cotyledon one, and if two, placed alternate. 



The plants of this sub-class hold an intermediate rank 

 between the Exogenous, or Dicotyledonous plants, in which 

 vegetation acquires its highest degree ef development, and 

 Cellulares, or Cryptogamia. where vegetation is of the low- 

 est order. In Exogenous plants there are two cotyledons ; 

 in the Endogenous there is one cotyledon, and in Cellulares 

 this part is entirely wanting. And the scale of vegetable 

 development appears to be graduated in exact conformity to 

 these circumstances, exhibiting a striking proof of the har- 

 mony that exists between die great features of vegetation, 



