APPENDIX G GLOSSARY
| Facultative plant species | Species that are equally likely to occur in wetlands and nonwetlands. |
| Facultative-upland plant species | Species that occur in nonwetlands 67 to 99 percent of the time. |
| Facultative-wet plant species | Species that occur in wetlands 67 to 99 percent of the time. |
| Floodplain | The valley floor adjacent to the incised channel of a stream, which may be inundated during high water. |
| Forbs | Herbs other than grasses. |
| Hydric soils | Soils that are saturated, flooded, or ponded long enough (7 days or longer) during the growing season to develop anaerobic conditions in their upper layer. |
| Hydrograph, rainfall | A graph of water level versus time. |
| Hydrophytic vegetation | Vegetation that grows in water, soil, or on a substrate that is at least periodically deficient in oxygen as a result of excessive water content. |
| Hyetograph | A graph of rainfall versus time. |
| Obligate species | Species that occur in wetlands most of the time (99 percent). |
| Riparian | Located along the banks of streams, rivers, lakes, and other bodies of water. |
| Vernal pool | A wetland created from standing water, typically in the spring, hence its name. |
| Wetland hydrology | Permanent or periodic inundation for at least 7 days during the growing season. |
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