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Pinus ponderosa / Mahonia repens Forest | Western Ecology Working Group of...
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Name: Pinus ponderosa / Mahonia repens Forest Reference: Western Ecology Working Group of... Description: This association has been described for only the Little Rocky Mountains of north-central Montana and the Black Hills of eastern Wyoming. Stands occur below 1280 m (4200 feet), adjacent to major creek bottoms and the lower toeslopes and footslope positions on adjacent slopes, showing no favor for particular aspects. In Montana, post-fire seral conditions can be dominated by almost pure stands of Populus tremuloides with scattered Pinus ponderosa in the seedling-sapling layer. Seral stands may also have relatively few veteran, fire-scarred Pinus ponderosa with Populus tremuloides in the understory. Stands undisturbed by fire (at least for several hundred years) may be pure Pinus ponderosa. The undergrowth is shrub-dominated with Mahonia repens (= Berberis repens), the diagnostic species, having the highest cover with Prunus virginiana, Symphoricarpos occidentalis and Spiraea betulifolia usually common. The only graminoid of note is Oryzopsis asperifolia. Forbs with high constancy include Eurybia conspicua (= Aster conspicuus), Thalictrum occidentale, Viola canadensis, Galium boreale, and Monarda fistulosa. In stands at Devils Tower, Wyoming, the overstory was dominated by Pinus ponderosa with cover in the 25-60% range. Though a range of tree sizes was present, it was difficult to identify two distinct strata. Juniperus scopulorum and Quercus macrocarpa were present but sparse. Shrub cover was less than 25% in stands sampled. Mahonia repens often dominated the shrub stratum but was sometimes sparse. Symphoricarpos albus was sometimes present but sparse. Herbaceous cover was in the 25-100% range, with a diverse mix of grassland and woodland species. Nassella viridula was a common graminoid in both stands sampled.  Accession Code: VB.CC.25398.PINUSPONDEROSAM Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Pinus ponderosa Forest Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Ponderosa Pine / Creeping Oregon-grape Forest   UID: ELEMENT_GLOBAL.2.688173 NatureServe Explorer   Code: CEGL000187   Scientific: Pinus ponderosa / Mahonia repens Forest   Common: Ponderosa Pine / Oregon Grape Forest (convergence) and Synonyms: (undetermined) Pinus ponderosa / Mahonia repens Forest