Name:
Agrostis (gigantea, stolonifera) Ruderal Herbaceous Vegetation
Reference:
Western Ecology Working Group of...
Description:
This semi-natural herbaceous association is typically found in more mesic areas such as riparian floodplains and seasonally flooded wetlands in the semi-arid western U.S. where <i>Agrostis</i> spp. have escaped from cultivation. Sites are typically flat to gently sloping or undulating. Elevations range from 854-2671 m (2800-8760 feet). Stands occur along low- to medium-gradient streams, often in broad, relatively flat, wet or irrigated meadows. Soil moisture ranges from dry to seasonally wet with stream and groundwater present. Substrates are variable. This type grows best on moist to temporarily wet soils, but it will tolerate poorly drained soils with high water tables and some flooding. Soil textures range from coarse alluvial sand and colluvium to fine clay, but it does best on clay loam and loam soils. The vegetation is characterized by a moderate to dense perennial graminoid layer dominated by introduced forage species <i>Agrostis gigantea</i> or <i>Agrostis stolonifera</i>. Other herbaceous species may occur as well, but they are generally less than 10% cover. Occasional shrubs or saplings may be present such as <i>Alnus incana ssp. tenuifolia, Populus angustifolia, Rosa woodsii</i>, or species of <i>Salix</i>. Common native species include graminoids <i>Carex</i> spp., <i>Deschampsia elongata, Eleocharis quinqueflora (= Eleocharis pauciflora), Hordeum jubatum, Juncus</i> spp., <i>Muhlenbergia asperifolia</i>, and forbs <i>Achillea millefolium, Argentina anserina, Artemisia ludoviciana, Equisetum</i> spp., <i>Iris missouriensis</i>, and <i>Thermopsis montana</i>. Other introduced species are common, such as <i>Bromus inermis, Cirsium arvense, Dactylis glomerata, Lolium pratense (= Festuca pratensis), Melilotus officinalis, Phalaris arundinacea, Phleum pratense, Plantago lanceolata, Poa pratensis, Rumex crispus, Taraxacum officinale, Trifolium</i> spp., and others.
Accession Code:
VB.CC.31893.CEGL001558
Plot-observations of this Community Concept:
0
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