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Douglas-fir seeds are an extremely important food source for small mammals such as moles, shrews, and chipmunks, which consume an estimated 65% of each annual seed crop. The Douglas squirrel harvests and hoards great quantities of Douglas-fir cones, and also consumes mature pollen cones, the inner bark, terminal shoots, and developing young ...
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]
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 ...
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 is the fourth tallest conifer and fifth tallest of all trees in the world (after sitka spruce).Currently, coast Douglas-fir trees 60–75 metres (197–246 ft) or more in height and 1.5–2 metres (4.9–6.6 ft) in diameter are common in old growth stands, [4] and maximum heights of 100–120 metres (330–390 ft) and diameters up to 4.5–5.5 metres (15–18 ft) have been ...
The Los Angeles County Department of Forestry has extensively planted the tree over a 50-year period for that purpose. Some hybrids of Pseudotsuga macrocarpa (Bigcone Douglas-fir) × Pseudotsuga menziesii (Coast Douglas-fir) show promise for planting on drier restoration sites within the P. menziesii−Douglas-fir natural range. These hybrids ...
Of California's total plant population, 2,153 species, subspecies, and varieties are endemic and native to California alone, according to the 1993 Jepson Manual study. [4] This botanical diversity stems not only from the size of the state, but also its diverse topographies , climates, and soils (e.g. serpentine outcrops ).
One of the oldest Douglas fir on record at 1,020 years in age [38] [25] [39] [40] Eureka Tree Coast redwood (Sequoia sempervirens) 115.824 380.00 United States Eureka, California Note: Standing height surveyed, and tree then cut down in 1914 and measured by lumbermen. [41] [42] Nisqually Tree Douglas-fir (Pseudotsuga menziesii) 115.824 380.00