Wetland Indicator Status is a measure of how frequently (or not) a plant is found growing in a wetland.
Click on the Wetland Indicator Status below to see a list of all trees and shrubs for this Indicator.
Definitions
OBL
Obligate Wetland Occurs almost always (estimated probability 99%) under natural conditions in wetlands.
FACW
Facultative Wetland Usually occurs in wetlands (estimated probability 67%-99%), but occasionally found in non-wetlands.
FAC
Facultative Equally likely to occur in wetlands or non-wetlands (estimated probability 34%-66%).
FACU
Facultative Upland Usually occurs in non-wetlands (estimated probability 67%-99%), but occasionally found on wetlands (estimated probability 1%-33%).
UPL
Obligate Upland Occurs almost always (estimated probability 99%) under natural conditions in non-wetlands in the regions specified. If a species does not occur in wetlands in any region, it is not on the National List.
A positive (+) or negative (−) sign is used for the facultative categories. The (+) sign indicates a frequency towards the wetter end of the category (more frequently found in wetlands) and the (−) sign indicates a frequency towards the drier end of the category (less frequently found in wetlands).).[1]