Well, if O. maculata is indeed a natural introduction, then it should be considered the same as, say, Eulophia alta, which also originated in Africa, but is found frequently in Florida. For that matter, Poly. concreta is also likely a blow-over from Africa.
Cattle egrets, which have only been recently (1940s) found in Florida, are considered 'native' for all intents and purposes. In fact, the Orange County Audubon Society in Central Florida, which excludes non-native species from its photo contest, will allow the cattle egret due to its naturally introduced status.
If it's an artificial escapee, then O. maculata should be considered a nonnative invasive. If not, then it should be considered as having naturally expanded its range into Florida just like Eulophia alta and the cattle egret.
---Prem
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