OBL Obligate Wetland Occurs almost always (estimated probability > 99%) under natural conditions in wetlands.
FACW Facultative Wetland Usually occur in wetlands (extimated probability 67%-99%), but occasionally found in nonwetlands
FAC Facultative Equally likely to occur in wetlands or nonwetlands (extimated probability 34%-66%).
FACU Facultative Upland Usually occur in nonwetlands (estimated probability 67%-99%), but occasionally found in wetlands (estimated probability 1%-33%).
UPL Obligate Upland Occur in wetlands in another region, but occur almost always (estimated probability >99%) under natural conditions in nonwetlnads in this region.
NI No Indicator No assignment, information insufficient.
* Limited information, assignment is tentative.
+/- A positive (+) or negative (-) sign is used with the Facultative Indicator categories to more specifically define the regional frequence of occurrence in wetlands. The positive sign indicatoes a greater frequency of occurrence in wetlands and a negative sign indicates a lesser frequency.