PLANTS. 219 



FIRST DIVISION. 

 VASCULAR PLANTS. 



These plants are provided with vessels and cellular 

 tissue. The germ is enveloped in one or more layers. 



CLASS I. 

 E X O G E IT M. 



The vascular organs, sap-wood, or alburnum, are com- 

 posed of one or more concentric rings or layers, the 

 youngest of which is always next the external covering. 

 Envelopes of germ in a whorl. 



A. Provided with double flower- envelopes, that is, 

 consisting of both calyx and corolla ; petals separate from 

 each other. 



SUB-CLASS I. 



Seed bearing. Flower polypetalous ; the petals in- 

 serted on the calyx. 



FIRST DIVISION. 



- 



Many fruit ov 11 Contained in one flower, or with the 



anth &; and'curea > ' d g e f the fl er ' 



*>*- '-T'-PAMILY. jiAXUXCUL^ have mostly weak and 

 flexible stems, often climbers or creepers, are warmly 

 aromatic plants, containhig"a juice which acts as an acrid 

 narcotic poison. 



The Common Buttercup (Ranunculus acris) is found 

 abundantly in meadows ; leaves notched, flowers brilliant 



