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Add/Drop	Name	Reference	Plots↓	Description
	Vitis californica Association » more details accession code: NOT CURRENTLY ACCEPTED	Great Valley Classification	1
	Platanus racemosa Alliance » more details accession code: NOT CURRENTLY ACCEPTED	MCV2	1
	Quercus lobata – Quercus wislizeni Association » more details accession code: NOT CURRENTLY ACCEPTED	MCV2	1
	Platanus racemosa – Quercus lobata Association » more details accession code: NOT CURRENTLY ACCEPTED	Great Valley Classification	1
	Populus fremontii / Salix exigua Association » more details accession code: NOT CURRENTLY ACCEPTED	MCV2	1
	Quercus lobata – Fraxinus latifolia / Vitis californica Association » more details accession code: NOT CURRENTLY ACCEPTED	MCV2	1
	Schoenoplectus acutus Alliance » more details accession code: NOT CURRENTLY ACCEPTED	MCV2	1
	Eleocharis macrostachya Association » more details accession code: NOT CURRENTLY ACCEPTED	MCV2	1
Comm #4891	Distichlis spicata Intermittently Flooded Herbaceous Alliance » more details accession code: VB.CC.17809.DISTICHLISSPICA	Western Ecology Working Group of...	1	This alliance occurs throughout much of the semi-arid and arid western U.S. in lowland sites such as playas, swales and terraces along washes that are intermittently flooded. The flooding is usually the result of highly localized thunderstorms. The unpredictable nature of the flooding is the key environmental factor separating this alliance from similar alliances with more predictable flooding regimes. Soils are deep, saline, alkaline and fine-textured. They generally have an impermeable layer and therefore are poorly drained. When the soil is dry, the surface usually has salt accumulations. This intermittently flooded grassland of playas and ephemeral streams has a sparse to dense herbaceous layer that is dominated by Distichlis spicata, sometimes occurring in nearly pure stands. The level of salinity in the soil may restrict associated species. Associated graminoids may include Puccinellia nuttalliana, Hordeum jubatum, Pascopyrum smithii, Sporobolus airoides, Carex filifolia, and Juncus balticus. Forb cover is generally low and may include Salicornia rubra, Triglochin maritima, Suaeda calceoliformis (= Suaeda depressa), Helianthus spp., and Asteraceae spp. Diagnostic of this alliance is the Distichlis spicata-dominated herbaceous layer and the presence of surface water for brief periods at unpredictable times during the growing season.
	Juglans hindsii Semi-natural Association » more details accession code: NOT CURRENTLY ACCEPTED	MCV2	1