Hydrolea Linnaeus.
A genus of about 11 species, aquatic and wetland herbs, of tropical and subtropical regions.no references.
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© Keith Bradley | 
© Paul Marcum | 
© Alan Cressler: Hydrolea corymbosa, Fred C. Babcock-Cecil M. Webb Wildlife Management Area, Charlotte County, Florida 1 by Alan Cressler | Hydrolea corymbosa source | Original Image ⭷
© Gary P. Fleming |