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Data and definitions in the PLANTS wetland reports are abstracted
from:
U.S. Fish and Wildlife Service. 1988. National list of
vascular plant species that occur in wetlands. U.S.
Fish & Wildlife Service Biological Report 88 (26.9).
U.S. Fish and Wildlife Service. 1993. 1993 supplement
to list of plant species that occur in wetlands: Northwest
(Region 9). Supplement to U.S. Fish & Wildlife
Service Biological Report 88 (26.9).
PLANTS wetlands reports contain some names
from these two wetland lists that are now considered to be
synonyms. Wetland status is reported individually for each
synonym, and these are indented below the currently accepted
name.
Indicator categories
| Indicator Code |
Wetland Type |
Comment |
| 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 in wetlands in another region, but 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. |
| NA |
No agreement |
The regional panel was not able to reach a unanimous
decision on this species. |
| NI |
No indicator |
Insufficient information was available to determine an
indicator status. |
| NO |
No occurrence |
The species does not occur in that region. |
National Indicators reflect the range of
estimated probabilities (expressed as a frequency of occurrence)
of a species occurring in wetlands versus non-wetland across
the entire distribution of the species. A frequency, for example,
of 67%-99% (Facultative Wetland) means that 67%-99% of sample
plots containing the species randomly selected across the range
of the species would be wetland. When two indicators are given,
they reflect the range from the lowest to the highest frequency
of occurrence in wetlands across the regions in which the species
is found. A positive (+) or negative (-) sign was used with
the Facultative Indicator categories to more specifically define
the regional frequency of occurrence in wetlands. The positive
sign indicates a frequency toward the higher end of the category
(more frequently found in wetlands), and a negative sign indicates
a frequency toward the lower end of the category (less frequently
found in wetlands). A question mark (?) following a National
Indicator denotes a tentative assignment based on the botanical
literature and not confirmed by regional review.
Regional Indicators express the estimated
probability (likelihood) of a species occurring in wetlands
versus non-wetlands in the region. Regional Indicators reflect
the unanimous agreement of the Regional Interagency Review
Panel. An asterisk (*) following a regional Indicator identifies
tentative assignments based on limited information from which
to determine the indicator status.
The wetland indicator categories should not be equated to
degrees of wetness. Many obligate wetland species occur in
permanently or semi-permanently flooded wetlands, but a number
of obligates also occur in and some are restricted to wetlands
which are only temporarily or seasonally flooded. The facultative
upland species include a diverse collection of plants, which
range from weedy species adapted to exist in a number of environmentally
stressful or disturbed sites (including wetlands), to species
in which a portion of the gene pool (an ecotype) always occurs
in wetlands. Both the weedy and ecotype representatives of
the facultative upland category occur in seasonally and semi-permanently
flooded wetlands.
Regions
The codes, their corresponding regions, and states in each
region are:
| Code |
Region |
Geographic areas in region |
| 1 |
Northeast |
CT, DE, KY, MA, MD, ME, NH, NJ, NY, OH,
PA, RI, VA, VT, WV |
| 2 |
Southeast |
AL, AR, FL, GA, LA, MS, NC, SC, TN |
| 3 |
North Central |
IA, IL, IN, MI, MN, MO, WI |
| 4 |
North Plains |
MT (Eastern), ND, SD, WY (Eastern) |
| 5 |
Central Plains |
CO (Eastern), NE, KS |
| 6 |
South Plains |
OK, TX |
| 7 |
Southwest |
AZ, NM |
| 8 |
Intermountain |
CO (Western), NV, UT |
| 9 |
Northwest |
ID, OR, MT (Western), WA, WY (Western) |
| 0 |
California |
CA |
| A |
Alaska |
AK |
| C |
Caribbean |
PR (Puerto Rico), VI (U.S. Virgin Islands) |
| H |
Hawaii |
HI (Hawaiian Islands), AS (American Samoa),
FM (Federated States of Micronesia), GU (Guam), MH (Marshal
Islands), MP (Northern Mariana Islands), PW (Palau), UM
(U.S. Minor Outlying Islands) |
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Additional Information
Additional information can be obtained from
the U.S.
Fish and Wildlife Service, National Wetlands Inventory.
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