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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
Abies concolor, the white fir, concolor fir, or Colorado fir, is a coniferous tree in the pine family Pinaceae. This tree is native to the mountains of western North America, including the Sierra Nevada and southern Rocky Mountains, and into the isolated mountain ranges of southern Arizona, New Mexico, and Northern Mexico. It naturally occurs ...
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 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).
A mature female big-cone pine (Pinus coulteri) cone, the heaviest pine cone A young female cone on a Norway spruce (Picea abies) Immature male cones of Swiss pine (Pinus cembra) A conifer cone , or in formal botanical usage a strobilus , pl. : strobili , is a seed-bearing organ on gymnosperm plants, especially in conifers and cycads .
Many species of trees inhabit these forests including pine, cedar, fir, and redwood. The understory also contains a wide variety of herbaceous and shrub species. Temperate coniferous forests sustain the highest levels of biomass in any terrestrial ecosystem and are notable for trees of massive proportions in temperate rainforest regions. [1]
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 ...
In Lassen Volcanic Park at the southern end of the Cascade Range, the upper montane forest is also known as red fir forest. [2] It has less diversity than the mixed coniferous forest below. [ 2 ] It occurs between 6,500 and 8,000 feet (2,000 and 2,400 m), consists of dense stands of red fir ( Abies magnifica ), and has little understory and few ...