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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 <i>Populus tremuloides</i> with scattered <i>Pinus ponderosa</i> in the seedling-sapling layer. Seral stands may also have relatively few veteran, fire-scarred <i>Pinus ponderosa</i> with <i>Populus tremuloides</i> in the understory. Stands undisturbed by fire (at least for several hundred years) may be pure <i>Pinus ponderosa</i>. The undergrowth is shrub-dominated with <i>Mahonia repens (= Berberis repens)</i>, the diagnostic species, having the highest cover with <i>Prunus virginiana, Symphoricarpos occidentalis</i> and <i>Spiraea betulifolia</i> usually common. The only graminoid of note is <i>Oryzopsis asperifolia</i>. Forbs with high constancy include <i>Eurybia conspicua (= Aster conspicuus), Thalictrum occidentale, Viola canadensis, Galium boreale</i>, and <i>Monarda fistulosa</i>. In stands at Devils Tower, Wyoming, the overstory was dominated by <i>Pinus ponderosa</i> with cover in the 25-60% range. Though a range of tree sizes was present, it was difficult to identify two distinct strata. <i>Juniperus scopulorum</i> and <i>Quercus macrocarpa</i> were present but sparse. Shrub cover was less than 25% in stands sampled. <i>Mahonia repens</i> often dominated the shrub stratum but was sometimes sparse. <i>Symphoricarpos albus</i> was sometimes present but sparse. Herbaceous cover was in the 25-100% range, with a diverse mix of grassland and woodland species. <i>Nassella viridula</i> was a common graminoid in both stands sampled.  Accession Code: VB.CC.33329.CEGL000187 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.688173 NatureServe Explorer   Translated: Ponderosa Pine / Creeping Barberry Forest   Scientific: Pinus ponderosa / Mahonia repens Forest   Code: CEGL000187