G1 = Critically imperiled globally because of extreme rarity (S or fewer occurrences or less than 1000 individuals) or because of extreme vulnerability to extinction due to some natural or man-made factor.

G2 = Imperiled globally because of rarity (6 to 20 occurrences of less than 3000 individuals) or be cause of vulnerability to extinction due to some biological or man-made event.

G3 = Either very rare and local throughout its range (21-100 occurrences or less than 10,000 individuals) or found locally in a restricted range or vulnerable to extinction because of other factors.

G4 = Apparently secure globally (may be rare in parts of its range).

G#/G# = Range of rank; insufficient data to assign specific global rank (e.g., G2G3); such compound ranks are categorized according to their higher rank (i.e., lower number).

G#T# = Rank of taxonomic subgroup such as subspecies or variety.

FEDERAL STATUS (U.S. Fish and Wildlife Service)

LE = Listed as Endangered Species under provisions of the Endangered Species Act; a species which is in danger of extinction throughout all or a significant portion of its range.

PE = Proposed for addition as an Endangered Species.

LT = Listed as a Threatened Species; a species which is likely to become an endangered species with in the foreseeable future throughout all or a significant portion of its range.

PT = Proposed for listing as Threatened Species.

Cl = Category 1 Candidate: substantial information is available to support listing of the species as endangered or threatened.

C2 = Category 2 Candidate: listing is possibly appropriate but conclusive information is not available.

3A = Taxon no longer being considered for listing because of persuasive evidence of extinction.

3B = Taxon no longer being considered for listing because it does not meet the Endangered Species Act's definition of "species."

3C = Taxon no longer being considered for listing because it appears to be more widespread or abundant than previously thought.

N = Not currently listed nor being considered for listing.

CPC STATUS (Center for Plant Conservation)

A = Taxa that could possibly go extinct in the wild within the next five years without conservation measures.

B = Taxa that could possibly go extinct in the wild within the next ten years without conservation measures.

C = Taxa that will probably remain extant in the wild for the next ten years.

X = Taxa that were once proposed as Priority A, B, or C, but that have since been removed from the list by one or more Regional Task Forces.

N = Not listed.