Florlsttc Composition 



The kinds of plant species, in the aggregate, that occur 

 in a community or in an area. 



Floristic Element 



Species that are characteristic of a certain territory but 

 occur also in a different one, e.g., an arctic species growing 

 in the high Rocky Mountains is an arctic element in the 

 flora of the Rockies. 



Floristic Region 



A portion of the earth's surface supporting a characteristic 

 flora which developed largely within this portion, e.g., the 

 Atlantic North American Region of the Boreal Kingdom. 



Floristic Territory 



A geographic area characterized by the common occur- 

 rence of a number of species which are more or less confined 

 to it, but other species may also be present. 



Flower 



The organ of the class Angiospermae, flowering plants, 

 consisting of one or more pistils (carpels) or stamens, or both, 

 and usually a calyx (composed of sepals) and a corolla (com- 

 posed of petals). 



Flower Induction 



The stimulation, presumably by Florigen (q. v.) which 

 initiates the production of flowers. 



Fluctuation 



A relatively irregular departure from more normal or 

 average conditions, cf. Community dynamics. 



Fluke 



A parasitic flatworm in the class Trematoda, phylum 

 Platyhelminthes, e.g., the liverfluke in sheep. 



Flume 



An open conduit of wood or other material for carrying 



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