Name:
Abies lowiana - Pinus ponderosa Eastern Sierran Forest & Woodland Alliance
Reference:
NatureServe Biotics 2019
Description:
This alliance consists of mixed conifer stands dominated by <i>Abies lowiana, Pinus monticola</i>, and <i>Pinus ponderosa</i> with varying amounts of <i>Calocedrus decurrens</i> and <i>Pinus contorta</i> in the tree layer. <i>Pseudotsuga menziesii</i> is usually absent. Other conifers present include <i>Calocedrus decurrens, Pinus contorta</i>, and <i>Pinus monticola</i> in the tree layer. This alliance includes stands of <i>Pinus ponderosa var. washoensis</i> also limited to the east side of the Sierra Nevada. Understories are typically open, with moderately low shrub cover and diversity that includes <i>Arctostaphylos patula, Arctostaphylos nevadensis, Chrysolepis sempervirens, Ceanothus</i> sp., and <i>Ribes viscosissimum</i>. Common herbaceous taxa include <i>Arnica cordifolia, Festuca</i> sp., <i>Poa nervosa, Carex inops, Pyrola picta</i>, and <i>Hieracium albiflorum</i>. In openings, <i>Wyethia mollis</i> can be abundant. Stands occur on the Modoc Plateau and Warner Mountains of California, north along the east slope of the southern Cascades in Oregon. These forests and woodlands range from just above the zone of ponderosa pine in the montane zone, to the upper montane zone at elevations of 1370 to over 2135 m (4500-7000 feet). Occurrences are found on all slopes and aspects, although more frequently on drier areas, including northwest- and southeast-facing slopes, but also on northerly slopes and ridges.
Accession Code:
urn:lsid:vegbank.org:commConcept:38891-{5B2A83C7-DFDC-4D9D-AF29-E55014C73E18}
Plot-observations of this Community Concept:
0
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