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Callitriche marginata - Downingia elegans - Eryngium aristulatum Western North American Vernal Pool Macrogroup | NatureServe Biotics 2019
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Name: Callitriche marginata - Downingia elegans - Eryngium aristulatum Western North American Vernal Pool Macrogroup
Reference: NatureServe Biotics 2019
Description: This macrogroup includes herbaceous communities that form distinct zones or concentric rings around shallow ephemeral pools from sea level to 2600 m (7800 feet) elevation. The number of species is high and changes from north to south, so there are no particularly characteristic species, although there are characteristic plant genera that can be described at the macrogroup level. These include species of <i>Callitriche, Downingia, Eryngium, Hemizonia, Lasthenia, Navarretia, Orcuttia, Plagiobothrys, Pogogyne, Psilocarphus, Sedella, Spergularia</i>, and <i>Trichostema</i>. Pools occur on shallow soils over volcanic bedrock, in scablands, on hardpan soils with an indurated clay or cemented layer that retains water throughout some portion of the spring, and that typically dry down completely into early summer months. These occur in British Columbia, Oregon, Washington, California and Mexico. 
Accession Code: urn:lsid:vegbank.org:commConcept:40488-{A3523C71-D696-4EEA-885A-F99BFFF3BFBB}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 15-Oct-2014 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.860581 NatureServe ExplorerNatureServe Explorer logo
  Code: M074
  Scientific: Callitriche marginata - Downingia elegans - Eryngium aristulatum Western North American Vernal Pool Macrogroup