A three-year demographic study of Harper's beauty (Harperocallis flava McDaniel), an endangered Florida endemic
The longleaf pine ecosystem has high plant species richness, especially at small scales (Walker and Peet 1983, Peet and Allard 1993), and is characterized by a large number of narrowly endemic (Estill and Cruzan 2001, Le Blonde 2001, Sorrie and Weakley 2001) and rare species (Hardin and White 1989, Peet and Allard 1993, Walker 1993). Because of habitat loss and changes, especially those produced by fire exclusion, dozens of longleaf pine associated plants are listed as threatened or endangered under the Endangered species Act. Many are ranked as G1-G3 species by The Nature Conservancy or are given special conservation status by various state governments (Nature-Serve 2005).
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