Ads
related to: rocky mountain douglas fir for sale- Christmas Trees on Sale
Enjoy a wide variety of Trees
at great prices plus free shipping.
- Shop Our Pre-Lit Trees
Color+Clear® Remote Control Lights.
Hand-Strung, No More Messy Wires!
- Christmas Trees on Sale
Search results
Results From The WOW.Com Content Network
Rocky Mountain Douglas-fir grows more slowly than coast Douglas-fir and is also much more cold tolerant. Tolerance of different environmental conditions varies among populations of Rocky Mountain Douglas-fir, especially among populations from the northern and southern Rockies. [13] However, even nearby populations can differ in cold hardiness. [14]
By far the best-known is the very widespread and abundant North American species Pseudotsuga menziesii, a taxonomically complex species [14] divided into two major varieties (treated as distinct species or subspecies by some botanists): coast Douglas-fir or "green Douglas-fir", on the Pacific coast; and Rocky Mountain Douglas-fir or "interior ...
The coast Douglas-fir variety is the dominant tree west of the Cascade Mountains in the Pacific Northwest. It occurs in nearly all forest types and competes well on most parent materials, aspects, and slopes. Adapted to a more moist, mild climate than the interior subspecies, it grows larger and faster than Rocky Mountain Douglas-fir.
Trees include Trembling aspen (Populus tremuloides), Lodgepole Pine (Pinus contorta), Engelmann spruce (Picea engelmannii), White spruce (Picea glauca), Subalpine fir (Abies lasiocarpa) [2] and Rocky Mountain Douglas-fir (Pseudotsuga menziesii var. glauca) as minor component in the central and southern part of the ecoregion.
The dominant vegetation type of this ecoregion is coniferous forest, composed mainly of ponderosa pine (Pinus ponderosa), Rocky Mountain Douglas-fir (Pseudotsuga menziesii subsp. glauca), subalpine fir (Abies lasiocarpa), Engelmann spruce (Picea engelmanni) and trembling aspen (Populus tremuloides), with limited populations of limber pine (Pinus flexilis).
Trees include Douglas-fir – Rocky Mountain Douglas-fir (Pseudotsuga menziesii var. glauca) in the north, and Mexican Douglas-fir (Pseudotsuga lindleyana) extending further south – along with species of pine, fir (Abies durangensis and Abies concolor) and spruce (Picea chihuahuana and Picea engelmannii var. mexicana), and sometimes oaks. [4]