1987 Wetland Delineation Manual - The Wetlands Regulation Center
1987 Wetland Delineation Manual - The Wetlands Regulation Center
1987 Wetland Delineation Manual - The Wetlands Regulation Center
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<strong>Wetland</strong> Delination <strong>Manual</strong>, <strong>1987</strong> 16<br />
Table 1<br />
Plant Indicator Status Categories*<br />
Indicator<br />
Indicator Category Symbol Definition _<br />
OBLIGATE WETLAND OBL Plants that occur almost always (estimated<br />
PLANTS probability >99%) in wetlands under natural<br />
conditions, but which may also occur rarely<br />
(estimated probability 67% to 99%) inwetlands, but may also occur<br />
(estimated probability 1% to 33% in nonwetlands).<br />
Examples: Fraxinus pennsylvanica,<br />
Cornus stolonifera.<br />
FACULTATIVE UPLAND FACU Plants that occur sometimes (estimated prob-<br />
PLANTS ability 1% to 67% to<br />
99%) in nonwetlands. Examples: Quercus<br />
rubra, Potentilla arguta.<br />
OBLIGATE UPLAND OBL Plants that occur rarely (estimated probability<br />
PLANTS 99%) in nonwetlands<br />
under natural conditions. Examples: Pinus<br />
echinata, Bromus mollis.<br />
* Categories were originally developed and defined by the USFWS National <strong>Wetland</strong>s Inventory<br />
and subsequently modified by the National Plant List Panel. <strong>The</strong> three facultative categories are<br />
subdivided by (+) and (-) modifiers (See Appendix C, Section 1).<br />
25 February 1997 Environmental Techncal Services Co. 834 Castle Ridge Rd Austin, Texas 78746