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Pseudotsuga menziesii / Quercus rugosa Forest | NatureServe Biotics 2019
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Name: Pseudotsuga menziesii / Quercus rugosa Forest
Reference: NatureServe Biotics 2019
Description: This minor conifer forest association occurs in mid-elevations of mountain ranges of southwestern New Mexico (Animas Mountains) and southeastern Arizona (Santa Catalina, Santa Rita, and Huachuca mountains with outliers in the Mogollon Mountains), and likely occurs in adjacent Texas and northern Mexico. Stands are found in rugged, steep topography and restricted to cool, dry-mesic sites from 1980-2285 m elevation on northerly aspects and from 2285-2440 m on warmer aspects. Soils are shallow and very rocky and are derived from rhyolite and granite parent materials. Rock outcrops are common. At higher elevations the association occurs on steep, mid and upper slopes with convex topography and windy exposures. Stands can also occur as a topo-edaphic climax at lower elevations in ravines and canyons, which have significant cold-air drainage. These sites have deeper soil, but remain cool. The tree canopy is dominated by <i>Pseudotsuga menziesii</i> with <i>Pinus ponderosa</i> or <i>Pinus arizonica</i> often codominant. <i>Pinus strobiformis</i> and <i>Pinus discolor</i> may be present in some stands. The shrub layer is dominated by the broad-leaved evergreen oak <i>Quercus rugosa</i>, often with &gt;60% cover. <i>Quercus hypoleucoides</i> is also commonly present, but with &lt;5% cover. On very rocky sites <i>Quercus chrysolepis</i> can be abundant, with cover up to 20%. The herbaceous layer has low cover and moderate diversity. Perennial grasses may include <i>Koeleria macrantha, Muhlenbergia longiligula</i>, and <i>Poa fendleriana</i>. Forbs typically present include <i>Galium tinctorium, Hedeoma hyssopifolia, Lathyrus graminifolius, Packera neomexicana, Thalictrum fendleri</i>, and <i>Vicia americana</i>. The dominance of <i>Quercus rugosa</i> in the shrub layer distinguishes this association from other <i>Pseudotsuga menziesii</i>-dominated forests. 
Accession Code: urn:lsid:vegbank.org:commConcept:29363-{0C6785BF-A958-4839-B7C9-4BEB0785F9FC}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Jul-1993 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.688547 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000454
  Translated: Douglas-fir / Netleaf Oak Forest
  Scientific: Pseudotsuga menziesii / Quercus rugosa Forest
(convergence) and Synonyms:
(similar) Pseudotsuga menziesii / Quercus rugosa Forest
(similar) Pseudotsuga menziesii / Quercus rugosa Forest
(similar) CEGL000454