Name:
Platanus occidentalis - Acer negundo - Juglans nigra / Asimina triloba / Mertensia virginica Floodplain Forest
Reference:
NatureServe Biotics 2019
Description:
This association occupies the higher elevations of floodplains, floodplain berms, and low terraces of major Mid-Atlantic rivers (e.g., Potomac, Shenandoah, Monocacy, James) and as the main floodplain vegetation on medium-sized rivers draining areas of nutrient-rich substrates (e.g., Antietam Creek, Bull Run). Soil texture is variable, ranging from silty-clay loams to loams over much of the range, and samples collected from plots had high base status. This vegetation type is a closed forest with mixed overstory dominance by <i>Platanus occidentalis, Juglans nigra, Carya cordiformis, Celtis occidentalis, Ulmus americana</i>, and, locally, <i>Fraxinus pennsylvanica, Liriodendron tulipifera</i>, and <i>Quercus shumardii</i>. <i>Acer saccharinum</i> is codominant in a minority of stands but absent or unimportant in many others. <i>Acer negundo</i> is strongly dominant in the subcanopy. <i>Asimina triloba</i> and/or <i>Lindera benzoin</i> dominate a moderately dense to dense shrub layer. The herb layer is rich in spring ephemerals and other nutrient-demanding species, including <i>Mertensia virginica, Asarum canadense, Chaerophyllum procumbens, Hydrophyllum canadense, Viola striata, Phlox divaricata, Podophyllum peltatum, Erythronium americanum, Dicentra canadensis, Sanicula odorata, Packera aurea, Claytonia virginica, Festuca subverticillata, Carex jamesii, Carex grisea, Floerkea proserpinacoides, Osmorhiza longistylis</i>, and <i>Ranunculus abortivus</i>. Invasive exotics, especially <i>Alliaria petiolata, Veronica hederifolia, Duchesnea indica, Urtica dioica ssp. dioica, Microstegium vimineum</i>, and <i>Glechoma hederacea</i>, are usually abundant.
Accession Code:
urn:lsid:vegbank.org:commConcept:32919-{12314F65-B500-4426-8F22-C1517B6277C6}
Plot-observations of this Community Concept:
0
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