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Pinus discolor / Quercus gambelii Woodland | NatureServe Biotics 2019
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Name: Pinus discolor / Quercus gambelii Woodland Reference: NatureServe Biotics 2019 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. <i>Pinus discolor</i> 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 <i>Pinus discolor</i>. Scattered individuals of the broad-leaved evergreen oak <i>Quercus rugosa</i> may occur in the tree canopy. The tall, broad-leaved deciduous shrub layer is codominated by <i>Quercus gambelii</i> and <i>Cercocarpus montanus</i> with scattered individuals of <i>Ptelea trifoliata</i> and <i>Symphoricarpos oreophilus</i>. 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 <i>Muhlenbergia tenuifolia</i> (10%), <i>Artemisia ludoviciana</i> (3%), and <i>Heliomeris multiflora var. multiflora</i> (3%) were the dominant herbaceous species described from the Gray Ranch. The <i>Quercus gambelii</i>-dominated shrub layer is diagnostic of this late-successional <i>Pinus discolor</i> woodland.  Accession Code: urn:lsid:vegbank.org:commConcept:29679-{4E29D8D0-3669-43F6-B777-1626F2F29750} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 19-Jul-1993 to: ongoing
	status: accepted Community's Parent: Pinus cembroides - Pinus discolor - Pinus edulis / Shrub Understory Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.687065 NatureServe Explorer   Code: CEGL000770   Translated: Border Pinyon / Gambel Oak Woodland   Scientific: Pinus discolor / Quercus gambelii Woodland (convergence) and Synonyms: (similar) CEGL000770 (similar) Pinus discolor / Quercus gambelii Woodland (similar) Pinus discolor / Quercus gambelii Woodland