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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 ...
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).
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
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
The usage of Colorado spruce dates to 1881, but is less frequent than the longer alternate. [21] [22] Occasionally encountered are the names Parry's spruce, prickly spruce, silver spruce, and white spruce. [9] Blue spruces are also rarely called silvertip fir, [23] but this name is also applied to Abies magnifica especially when sold as ...
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.
The Douglas squirrel (Tamiasciurus douglasii) is a pine squirrel found in western North America, from the Pacific Northwest (including the northwestern coastal states of the United States as well as the southwestern coast of British Columbia in Canada) to central California, with an isolated subspecies in northern Baja California, Mexico.
The cones are 8–17 cm (3– 6 + 1 ⁄ 2 in) long and 4–6 cm (1 + 1 ⁄ 2 – 2 + 1 ⁄ 4 in) broad, dark purple before maturity; [4] [5] the scale bracts are short, and hidden in the closed cone. The brownish winged seeds are 3.5 mm (1 ⁄ 8 in) long [4] and released when the cones disintegrate at maturity about 6–7 months after pollination.