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Pinus discolor / Quercus gambelii Woodland | Western Ecology Working Group of...
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Name: Pinus discolor / Quercus gambelii Woodland Reference: Western Ecology Working Group of... Description: This Madrean conifer woodland has been documented only from the Animas Mountains in extreme southwestern New Mexico, but likely occurs elsewhere in the 'Borderlands' in adjacent southeastern Arizona and northern Mexico. It occurs in the foothills zone at the upper limits of the pinyon pine zone (roughly 2440 m elevation), on moderately steep to steep slopes (25%). The stand on the Gray Ranch is on a northerly mid-slope that receives warm upslope airflow. Pinus discolor has been described as occurring primarily on northerly slopes elsewhere in the southwestern U.S. Soils are gravelly and derived from rhyolite and tuff. This woodland association has an open tree canopy that is dominated by the small needle-leaved evergreen tree Pinus discolor. Scattered individuals of the broad-leaved evergreen oak Quercus rugosa may occur in the tree canopy. The tall, broad-leaved deciduous shrub layer is codominated by Quercus gambelii and Cercocarpus montanus with scattered individuals of Ptelea trifoliata and Symphoricarpos oreophilus. Cover of the tree canopy averages 30%, with the shrub layer having up to 45% cover. The moderately dense herbaceous layer (averages 25% cover) is a mixture of perennial grasses and forbs and has relatively few species. The perennial grass Muhlenbergia tenuifolia (= Muhlenbergia monticola) (10%), Artemisia ludoviciana (3%), and Heliomeris multiflora var. multiflora (3%) were the dominant herbaceous species described from the Gray Ranch. The Quercus gambelii-dominated shrub layer is diagnostic of this late-successional Pinus discolor woodland.  Accession Code: VB.CC.22264.PINUSDISCOLORQU 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 discolor Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Border Pinyon / Gambel Oak Woodland   UID: ELEMENT_GLOBAL.2.687065 NatureServe Explorer   Code: CEGL000770   Scientific: Pinus discolor / Quercus gambelii Woodland   Common: Border Pinyon / Gambel Oak (convergence) and Synonyms: (undetermined) Pinus discolor / Quercus gambelii Woodland