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The Douglas fir (Pseudotsuga menziesii) [4] is an evergreen conifer species in the pine family, Pinaceae.It is native to western North America and is also known as Douglas-fir, [5] Douglas spruce, [6] Oregon pine, [7] and Columbian pine. [8]
Cedar hemlock douglas-fir forest is a vegetation association in California, United States. This is one of the Kuchler system forest types used to classify California plant communities. [1] As the name implies, dominant tree types are Incense cedar, Western Hemlock and Douglas fir. The forest type is classified FRES20 in the Kuchler system. [2]
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]
Douglas-fir forests are found on gentle slopes, north-facing slopes, ridges with deep soil, and river terraces with deep sediments, usually underlain with sedimentary rocks. Coast Douglas-fir (Pseudotsuga menziesii ssp. menziesii) is the predominant tree, occupying up to 70% of the forest cover. Broadleaf evergreen trees are relatively few.
Coast Douglas-fir seed cone, from a tree grown from seed collected by David Douglas Pseudotsuga menziesii var. menziesii has attained heights of 393 feet (120* m). That was the estimated height of the tallest conifer ever well-documented, the Mineral Tree ( Mineral, Washington ), measured in 1924 by Dr. Richard E. McArdle, [ 7 ] former chief of ...
The highest elevations in the forest are located in the San Francisco Peaks area north of Flagstaff. Here grow large conifers such as Engelmann spruce, blue spruce, subalpine fir, corkbark fir (a variety of subalpine fir found only in isolated areas of Arizona and New Mexico), Douglas-fir, bristlecone pine, and limber pine. Isolated stands of ...
Santa Lucia fir (Abies bracteata) and seven other native Abies species; Douglas fir (Pseudotsuga menziesii) Bigcone Douglas-fir (Pseudotsuga macrocarpa) - Central Coast and Santa Susana Mountains. California nutmeg (Torreya californica) Incense cedar (Calocedrus decurrens) Port Orford cedar/Lawson's cypress (Chamaecyparis lawsoniana)
The forest contains continuous stands of ponderosa pine, Jeffrey pine, Douglas fir, red fir, white fir, lodgepole pine, Baker Cypress (Cupressus bakeri), and incense cedar. Old growth forest is estimated to cover some 168,000 acres (680 km 2) of forest land. [2] Forest headquarters are located in Yreka, California.