trees/ Predominant habitat type (%) [++] ([m.sup.2]/ha) ha) Abies lasiocarpa/Vaccinium Picea engelmannii
33.2 655 scoparium-V.scoparium (56%), A.
Good choices include alpine fir (Abies lasiocarpa), Colorado blue spruce (Picea pungens glauca), Engelmann spruce (Picea engelmannii
), and white fir (A.
Forests composed primarily of Engelmann spruce (Picea engelmannii Parry ex Engelm.) and subalpine fir (Abies lasiocarpa (Hook.) Nutt.) are extensive in the subalpine zone of the mountains of western North America and many studies have examined their dynamics (e.g., Oosting and Reed, 1952; Whipple and Dix, 1979; Veblen, 1986a; Aplet et al., 1988; Veblen et al., 1994).
Factors influencing understory seedling establishment of Engelmann spruce (Picea engelmannii) and subalpine fir (Abies lasiocarpa) in southeast Wyoming.
They are named for Euro-Americans (Engelmann spruce, Picea engelmannii
) and Native Americans (Giant Sequoia, Sequoiadendron giganteum), for poisons (poison sumac, Toxicodendron vernix) and for sweets (sugar maple, Acer saccharum).
Species of plant Common name Pteridium aquilinum Western bracken fern Picea engelmannii
Blue spruce Toxicodendron diversilobum Poison oak Artemisia californica Coastal sagebrush Artemisia douglasiana Mugwort Baccharis pilularis Coyote brush Lonicera interrupts Chaparral honeysuckle Non-local Lonicera Honeysuckle Sambucus mexicana Blue elderberry Arctostaphylos Manzanita Quercus agrifolia Coast live oak Quercus douglasii Blue oak Ribes californicum Hillside gooseberry Salvia mellifera Black sage Ceanothus cuneatus Buckbrush Cercocarpus betuloides California mountain-mahogany Rosa californica California wild rose Rubus ursinus Pacific blackberry Galium porrigens Bedstraw
In Gunnison County, Colorado, aspen occurs at elevations between 2600 m and 3400 m (Langenheim, 1962) where it may grow in mixed stands with subalpine conifers, commonly Engelmann spruce (Picea engelmannii
) and subalpine fir (Abies lasiocarpa), or as relatively pure aspen forests.
Englemann spruce (Picea engelmannii
gel) at its upper limits in the Front Range, Colorado.
The northeast corner of this burn was used for sampling the seed deposition from an old-growth Picea engelmannii forest [ILLUSTRATION FOR FIGURE 5 OMITTED].
Although the density (B) of Picea engelmannii canopy trees was measured at Vermilion Pass, the mean number of filled seeds per canopy tree (Q) was not known.
var latifolia Engelm., Picea engelmannii [TABULAR DATA FOR TABLE 1 OMITTED] Parry ex.
Species sampled were pine (Pinus contorta), spruce (Picea engelmannii), fir (Abies lasiocarpa), aspen (Populus tremuloides).