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invasives/definition

Here are the definitions used by the Florida Exotic Pest Plant Council
(www.fleppc.org):

Category I invasive: Invasive exotics that are altering native plant
communities by displacing native species, changing community structures or
ecological functions, or hybridizing with natives. 

Category II invasive: Invasive exotics that have increased in abundance or
frequency but have not yet altered Florida plant communities to the extent
shown by Category I species.

Note that this list deals only with "exotics." Surely some native plants are
capable of being invasive???? The passionflower in my yard qualifies, in my
opinion, and it's a native plant. 

Gerri Bauer

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