Name:
Lasthenia fremontii - Distichlis spicata Vernal Pool Alliance
Reference:
NatureServe Biotics 2019
Description:
This alliance consists of intermittent to continuous cover of herbs and subshrubs <50 cm in height. <i>Cressa truxillensis, Distichlis spicata</i>, and/or <i>Lasthenia fremontii</i> are characteristically present and may be dominant in the herbaceous layer with other indicator species, including <i>Atriplex persistens, Crypsis schoenoides, Downingia bella, Downingia insignis, Grindelia camporum, Centromadia pungens, Hordeum depressum, Lasthenia glaberrima, Lasthenia platycarpha, Lepidium dictyotum, Lilaea scilloides, Limnanthes douglasii ssp. rosea, Myosurus minimus, Navarretia leucocephala, Plagiobothrys stipitatus, Pleuropogon californicus</i>, and <i>Psilocarphus brevissimus</i>. Other plants may include <i>Achyrachaena mollis, Arthrocnemum subterminale, Brodiaea coronaria, Centromadia</i> spp., <i>Cicendia quadrangularis, Cotula coronopifolia, Crassula connata, Croton setigerus, Cynodon dactylon, Deinandra</i> spp., <i>Eleocharis acicularis, Epilobium</i> spp., <i>Eryngium aristulatum, Gnaphalium palustre, Hemizonia congesta, Hordeum</i> spp., <i>Juncus arcticus, Lactuca serriola, Lepidium</i> spp., <i>Marsilea vestita, Medicago polymorpha, Phalaris lemmonii, Plantago</i> spp., <i>Poa secunda, Polygonum</i> spp., <i>Senecio vulgaris, Spergularia platensis</i>, or <i>Trifolium</i> spp. Rare taxa in this alliance include low constancy of <i>Astragalus tener var. tener, Atriplex persistens, Downingia pusilla, Gratiola heterosepala, Legenere limosa</i>, and <i>Orcuttia pilosa</i>. This alliance occurs in California at low elevations (0-30 m) in alkaline or saline claypan pools on recent alluvial deposits of <20,000 years old. Soils are alkaline (pH >9) with sodium-rich clay and low permeability. They are short-inundated and lose water mostly through evaporation.
Accession Code:
urn:lsid:vegbank.org:commConcept:39380-{12A16D18-0987-487D-888A-15AE4E334876}
Plot-observations of this Community Concept:
0
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