Name:
Platanus occidentalis - Acer negundo - Juglans nigra / Asimina triloba / Mertensia virginica Forest
Reference:
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 (= Senecio aureus), 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:
VB.CC.37284.CEGL004073
Plot-observations of this Community Concept:
60
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