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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 needles. [13] Mature or "old-growth" Douglas-fir forest is the primary habitat of the red tree vole (Arborimus longicaudus) and the spotted owl (Strix occidentalis).
Abies concolor subsp. concolor — Colorado white fir or Rocky Mountain white fir A smaller tree to 25–35 m (80–115 ft) tall, rarely 45 m (150 ft). Foliage blue-green, [ 8 ] strongly upcurved to erect on all except weak, shaded shoots in the lower crown; leaves mostly 3.5–6 cm ( 1 + 3 ⁄ 8 – 2 + 3 ⁄ 8 in), and strongly glaucous on ...
Original – Rocky Mountain Douglas-fir, young female cone Reason Was featured on Commons two weeks ago. Illustrates subject well. Articles in which this image appears Douglas fir, Pseudotsuga menziesii var. glauca, Conifer cone FP category for this image Wikipedia:Featured pictures/Plants/Flowers Creator Ivar Leidus
Fraser fir is monoecious, meaning that both male and female cones occur on the same tree. [11] Cone buds usually open from mid-May to early June. Female cones are borne mostly in the top few feet of the crown and on the distal ends of branches. Male cones are borne below female cones, but mostly in the upper half of the crown.
In contrast to spruces, fir cones are erect; they do not hang, unless heavy enough to twist the branch with their weight. The mature cones are usually brown. When young in summer, they can be green: A. grandis, A. holophylla. or reddish: A. alba, A. cephalonica, A. nordmanniana. or bloomed pale glaucous or pinkish: A. numidica, A. pinsapo
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The male cones are 2–3 cm (3 ⁄ 4 – 1 + 1 ⁄ 4 in) long, and are typically restricted to, or more abundant on, lower branches. Pollen cones develop over 1 year and wind-dispersed pollen is released for several weeks in the spring. Rocky Mountain Douglas-fir cones Left: Shuswap Lake, British Columbia, Canada
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