Name:
Eupatorium serotinum - Polygonum (lapathifolium, punctatum, pensylvanicum) Riverbar Wet Meadow
Reference:
NatureServe Biotics 2019
Description:
This association is known only from the Potomac and Shenandoah rivers in the Piedmont and mountain provinces of Maryland, Virginia, and West Virginia. Well-documented occurrences are concentrated in high-gradient reaches, particularly near the fall-line (Potomac Gorge) and Bull Falls at Harpers Ferry. The type occurs on sandy riverbanks and depositional bars, as well as in sand deposits on bedrock floodplains and boulder bars. These habitats experience high rates of sediment erosion and turnover during even moderate floods and are inundated for 3-12% of the year, but are generally exposed for most of the growing season. Vegetation may be sparse during years of more continuous high water during the growing season. In normal growing seasons, the type is a dense growth of tall (1-2 m), predominantly annual herbs. Some weedy, fast-growing perennials are also characteristic. <i>Artemisia annua, Amaranthus spinosus, Datura stramonium, Eupatorium serotinum, Polygonum lapathifolium, Polygonum pensylvanicum, Polygonum punctatum</i>, and <i>Verbena urticifolia</i> are relatively constant and generally contribute most of the cover. Additional, less constant or abundant species include <i>Dysphania ambrosioides, Conoclinium coelestinum, Hibiscus laevis, Mollugo verticillata, Perilla frutescens, Polygonum cespitosum var. longisetum, Solanum carolinense, Solanum ptycanthum, Teucrium canadense, Urtica dioica ssp. dioica, Verbena hastata</i>, and <i>Verbesina alternifolia</i>. Herbaceous vines may also be numerous, with <i>Calystegia sepium, Cynanchum laeve</i>, and <i>Cuscuta gronovii</i> most frequent. Scattered individuals of shrubby to full-sized flood-tolerant trees (e.g., <i>Platanus occidentalis, Acer saccharinum</i>) may be present.
Accession Code:
urn:lsid:vegbank.org:commConcept:35119-{5188B47C-3C4B-4A1E-9777-B51E0DCE9FBF}
Plot-observations of this Community Concept:
15
|
| |
|
 |
Names:
UID: ELEMENT_GLOBAL.2.802169
NatureServe
Explorer
Code: CEGL006481
Translated: Late-flowering Thoroughwort - (Curlytop Knotweed, Dotted Smartweed, Pennsylvania Smartweed) Riverbar Wet Meadow
Common: Piedmont-Central Appalachian Scour Bar Wet Meadow
Scientific: Eupatorium serotinum - Polygonum (lapathifolium, punctatum, pensylvanicum) Riverbar Wet Meadow
(convergence) and Synonyms:
(similar)
Eupatorium serotinum - Polygonum (lapathifolium, punctatum, pensylvanicum) Herbaceous Vegetation
|
