Name:
Avena fatua - Bromus diandrus Ruderal Grassland, Meadow & Scrub Group
Reference:
NatureServe Biotics 2019
Description:
This group encompasses the non-native-dominated annual or perennial grasslands and forblands found in warm-temperate or Mediterranean California. They occur on the coastal plains, in the Central Valley, in the foothills and in disturbed rural and urban areas. Native graminoid and forb species can be present with low or insignificant cover. The overwhelming dominance of the introduced species is undeniable. Non-native species make up 50-96% of the foliar cover. Dominant introduced graminoid species include <i>Aegilops triuncialis, Avena fatua, Avena barbata, Bromus diandrus, Bromus hordeaceus, Bromus madritensis, Cortaderia jubata, Cortaderia selloana, Lolium perenne ssp. multiflorum, Hordeum murinum, Pennisetum ciliare, Pennisetum setaceum, Taeniatherum caput-medusae, Vulpia bromoides</i>, and <i>Vulpia myuros</i>. Introduced forb species include <i>Brassica nigra, Carduus pycnocephalus, Centaurea</i> spp., <i>Erodium botrys, Erodium cicutarium, Medicago polymorpha, Geranium dissectum, Hypochaeris glabra, Medicago polymorpha</i>, and <i>Raphanus sativus</i>. Species in non-native shrublands include <i>Ulex europaeus, Cytisus scoparius </i>, and species of <i>Genista</i> and <i>Spartium</i>, among others. There are many more species that can be dominant. California annual grassland is found on a wide variety of soils, sometimes in complex mosaics. Most are noncalcic Mollisols, medium to heavy texture, about 0.5 m deep.
Accession Code:
urn:lsid:vegbank.org:commConcept:40132-{7DAD66AF-5639-498C-9999-726C23E83D7E}
Plot-observations of this Community Concept:
0
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