Plant Status Codes
Pennsylvania Plant Status Codes (per DCNR)
PE - Pennsylvania Endangered
Plant species which are in danger of extinction throughout most of their natural range within this Commonwealth, if critical habitat is not maintained or if the species is greatly exploited by man. This classification shall also include any populations of plant species that have been classified as Pennsylvania Extirpated, but which subsequently are found to exist in this Commonwealth.
PT - Pennsylvania Threatened
Plant species which may become endangered throughout most or all of their natural range within this Commonwealth, if critical habitat is not maintained to prevent their future decline, or if the species is greatly exploited by man
PR - Pennsylvania Rare
Plant species which are uncommon within this Commonwealth. All species of the native wild plants classified as Disjunct, Endemic, Limit of Range and Restricted are included within the Pennsylvania Rare classification.
PV - Pennsylvania Vulnerable
Plant species which are in danger of population decline within Commonwealth because of their beauty, economic value, use as a cultivar, or other factors which indicate that persons may seek to remove these species from their native habitats.
State Rank Codes and Definitions (per NatureServe)
S1 - Critically Imperiled
Critically imperiled in the nation or state because of extreme rarity (often 5 or fewer occurrences) or because of some factor(s) such as very steep declines making it especially vulnerable to extirpation from the state.
S2 - Imperield
Imperiled in the nation or state because of rarity due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors making it very vulnerable to extirpation from the nation or state.
S3 - Vulnerable
Vulnerable in the nation or state due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors making it vulnerable to extirpation.
S4 - Apparently Secure
Uncommon but not rare; some cause for long-term concern due to declines or other factors.
S5 - Secure
Common, widespread, and abundant in the nation or state.
S#S# - Range Rank
A numeric range rank (e.g., S2S3 or S1S3) is used to indicate any range of uncertainty about the status of the species or ecosystem.
SNR - Not Ranked
State conservation status not yet assessed.
Global Rank Codes and Definitions (per NatureServe)
G1 - Critically Imperiled
At very high risk of extinction due to extreme rarity (often 5 or fewer populations), very steep declines, or other factors.
G2 - Imperield
At high risk of extinction due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors.
G3 - Vulnerable
At moderate risk of extinction due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors.
G4 - Apparently Secure
Uncommon but not rare; some cause for long-term concern due to declines or other factors.
G5 - Secure
Common; widespread and abundant.