Grand Fir, Abies grandis - Native Plants PNW
Grand Fir is most easily recognized by its long needles borne horizontally on opposite sides of the twigs. The entire branch will appear flattened so that it has distinct upper and lower sides. White Fir, Abies concolor, which is native to southern Oregon, California and much of the Southwest, has a similar appearance but has silvery, blue ...
Grand Fir – Abies grandis - NW Conifers
Cones: The cones sit upright on the branches near the treetop. Like other firs, grand fir cones fall apart at maturity, dispersing the winged seeds and leaving a cone core spike on the branch. You won't find grand fir cones on the ground, but you might see some of these scales. Note that the short bracts are hidden inside the cone.
Seed production in grand fir is relatively low. A good cone crop is considered to be more than 40 cones per tree – the interval between good seed crops is about 2-3 years. Seed production begins at about 20 years of age. Germination is best on mineral soil but in open sites the seeds germinate nearly as well on duff as on any other surface.
Grand Fir - US Forest Service Research and Development
In the Inland Empire, a good cone crop for grand fir is considered to be more than 40 cones per tree. A fair crop is 21 to 40 cones per tree. Grand fir seeds caught annually in seed traps on two sample plots averaged 42,000/ha (17,000 acre) on the Kaniksu National Forest and 58,100/ha (23,500 acre) on the Coeur d'Alene National Forest.
Abies grandis (grand fir) description - conifers.org
2024年11月27日 · Description of the evolution, biology, distribution, ecology, and uses of Abies grandis (grand fir).
Grand Fir - Abies grandis - PNW Plants - Washington State …
Cones are held in an upright fashion and can be 2”-4” long. Most cones appear in the upper portion of the tree. Grand fir is grown on a wide array of soil types, though it does best in areas west of the Cascades where summers are mild and winters are cool and wet. It can be raised in either sun or shade.
Grand Fir - Idaho Forests Products Commission
Grand fir seed cones are cylindrical in shape, and range from two to four inches in length. The greenish hue of the grand fir’s cones make them easy to distinguish from the white fir’s olive-green to purple colored cones. Grand fir trees grow to heights of 100 to 125 feet, with trunk diameters in the 4- to 6-foot range.
Grand Fir – Abies grandis - NW Conifers
Cones: The cones sit upright on the branches near the treetop. Like other firs, grand fir cones fall apart at maturity, dispersing the winged seeds and leaving a cone core spike on the branch. You won't find grand fir cones on the ground unless they were dropped by squirrels.
Grand Fir – Abies grandis - Sound Native Plants
2021年10月30日 · This tree has both male and female cones- the male cones cluster underneath the needles, while the tall female cones stand upright above the needles and are much larger. When true fir cones mature, the cones shed their seeds while still borne on the branches, unlike Douglas-firs and other conifers.
Abies grandis | Conifers of UBC
The seed cones of the Grand Fir are typically 6-12cm long, are short and spherical in shape, and have approximately 100-150 scales. Seed cones are also yellowish green at maturity and grow upright on branches. The cones also have short bracts. During autumn, the scales of the cone are shed along with the seeds.