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NPLichen, a database of lichens in the U. S. National Parks (Wetmore and Bennett, 1992), has been extensively revised and expanded, and is now available for public use at www.ies.wisc.edu/nplichen. As of this writing, the database contains 25,995 records of lichens in 144 national park units. The number of records of lichens not in the North American lichen checklist (Esslinger 1997) is 161, for a total of 26,156. These records include multiple occurrences of a species in some parks because more than one reference has reported presence of species. Consequently, the number of species in parks records (including new to North America) without these duplicate references is 14,986. Our table of misidentified taxa contains 307 records.
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NPLichen: a database of lichens in the U.S. national parks