Name:
Juniperus occidentalis / Achnatherum thurberianum Open Woodland
Reference:
NatureServe Biotics 2019
Description:
These are open woodlands or juniper savannas which are restricted to barren, ashy soils in the central Oregon juniper zone. <i>Juniperus occidentalis / Achnatherum thurberianum</i> woodlands are found on all aspects and slopes, at elevations between 610 and 1370 m (2000-4500 feet). <i>Juniperus occidentalis</i> is the only tree, with the cover ranging from 5-20%. <i>Juniperus occidentalis</i> trees can be very large and quite old, with individuals found to be over 1000 years old in similar habitats in central Oregon. <i>Artemisia tridentata ssp. wyomingensis</i> is common in some areas and absent from others, with cover from 0-40%. <i>Ericameria nauseosa, Salvia dorrii, Peraphyllum ramosissimum, Purshia tridentata</i>, and <i>Atriplex confertifolia</i> are shrubs that can occasionally be found in this type. The understory is dominated by <i>Achnatherum thurberianum</i>, which is always present, at 2-50% cover. <i>Pseudoroegneria spicata</i> is often codominant, especially in stony microsites. In areas with more exposed ash, <i>Hesperostipa comata</i> and <i>Achnatherum hymenoides</i> can also be important, and <i>Poa secunda</i> and <i>Leymus cinereus</i> occur. Annual forbs (<i>Mimulus nanus, Eriogonum vimineum, Crocidium multicaule, Collinsia parviflora, Blepharipappus scaber, Cleome platycarpa</i>) and perennial forbs (<i>Balsamorhiza sagittata, Astragalus filipes, Astragalus purshii, Calochortus macrocarpus, Castilleja</i> spp., <i>Erigeron filifolius, Eriogonum umbellatum, Lomatium hendersonii</i>) occur and make the association species rich, but provide very little cover.
Accession Code:
urn:lsid:vegbank.org:commConcept:31543-{9D8B8C88-47E2-40E4-A0BE-E85B2D7C2E1A}
Plot-observations of this Community Concept:
0
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