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COR Wetland Mitigation Memorandum October 7, 2021 Page 5 dominated by hybrid cattail, other native species are present including several sedges. Reed canary grass (Phalaris arundinacea) is low density. Most of the vegetation diversity is located along the edges, as are several red osier dogwood shrubs that may have been planted as part of landscaping. Given the distribution and presence primarily as small areas of individual plants, this appears to be remnants of what was a more diverse site prior to cattail-dominance. A previous reference to a large area of sedge meadow that was present in 2011 could not be located and is presumed no longer present within the limits. Upland buffer is present around the entire perimeter. The buffer width varies but is approximately 10 feet on average. The site is located within a greenway corridor, so there is maintained turf outside of the unmanaged vegetation. For the purposes of this evaluation, the extent of the upland buffer did not include any areas of turf. The upland buffer is diverse, and has a large percentage of native species, including several grasses and forbs. Like the wetland, the composition and distribution of native species indicates much of it is a remnant of previous plantings. Several invasives have become established but are also widely dispersed. Table 5 is a summary of the vegetation observed in the wetland and upland buffer portions of the Charter mitigation site. Table 5: Charter Mitigation Site Vegetation Summary Wetland Plant Inventory Upland Buffer Plant Inventory Scientific Name Common Name Scientific Name Common Name Acorus calamus Sweetflag Andropogon gerardii Big bluestem Carex lacustris Lake sedge Astragalus canadensis Canada milk vetch Carex stricta tussock sedge Berteroa incana Hoary alyssum Corpus sericea Red osier dogwood Bouteloua curtipendula Sideoats grama Eleocharus obtusa blunt spikerush Elymus canadensis Canada wild rye Helenium autumnale Sneezeweed Helianthus giganteus Giant sunflower Onoclea sensibilis Sensitive fern Linaria vulgaris Butter and Eggs Phalaris arundinacea Reed canary grass Monarda fistulosa Wild bergamot Scirpus cyperinus Woolgrass Panicum virgatum Switchgrass Typha glauca Hybrid cattail Potentilla norvegica Norwegian cinquefoil Schizachyrium scoparium Little bluestem Solidago canadensis Canada goldenrod Sonchus arvense Sow thistle Sorghastrum nutans Indian grass Symphyotrichum Skyblue aster oolentan Tense Thlapsi arvense Field pennycress Urtica dioca Stinging nettle Verbascum thapsus Common mullein Soils within the wetland were dominated by black and dark brown coarse sand, which is likely the soil present from construction. Hydrology was present as inundation for most of the basin, and saturation near the perimeter. Inlet and outlet structures are present to assist with moderating hydrology within the site.