Extension ServiceDouglas-fir, Pseudotsuga menziesii
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Douglas-fir, Pseudotsuga menziesii
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Dormant needle buds
Photo by Brad Withrow-Robinson -
closed needle buds
Photo by Declan O'Hara -
closed pollen cone, and closed needle bud
Photo by Amy Grotta -
pollen cones and open pollen cones
Photo: Mark Schulze -
Unripe seed cone, pollen cones, and open pollen cones
Photo by Jody Einerson -
Unripe seed cone, pollen cones, and open pollen cones.
Photo by Mike Albrecht -
Swelling needle buds, bud on right would be "breaking needle buds."
Photo by Mark Schulze -
Breaking needle buds.
Photo by Mark Schulze -
Breaking needle buds.
Photo by Mark Schulze -
Mark "young needles" as the new needles are starting to spread away from the developing stem.
Photo by Mark Schulze -
Ripe seed cone, and recent seed drop.
Photo by Brad Withrow-Robinson -
Douglas-fir
Photo by Brad Withrow-Robinson -
Unripe seed cone, and young needles.
Photo: Brad Withrow-Robinson
Breaking needle buds
One or more breaking needle buds are visible on the plant. A needle bud is considered "breaking" once a green needle tip is visible at the end of the bud, but before the first needle from the bud has unfolded and spread away at an angle from the developing stem.
Young needles
One or more young, unfolded needles are visible on the plant. A needle is considered "young" and "unfolded" once it has spread away from the developing stem enough that its point of attachment to the stem is visible, but before it has reached full size or turned the darker green color or tougher texture of mature needles on the plant.
Pollen cones
One or more fresh, male pollen cones (strobili) are visible on the plant. Cones have overlapping scales that are initially tightly closed, then spread apart to open the cone and release pollen. Include cones that are unopened or open, but do not include wilted or dried cones that have already released all of their pollen.
Open pollen cones
One or more open, fresh, male pollen cones (strobili) are visible on the plant. Cones are considered "open" when the scales have spread apart to release pollen. Do not include wilted or dried cones that have already released all of their pollen.
Pollen release
One or more male cones (strobili) on the plant release visible pollen grains when gently shaken or blown into your palm or onto a dark surface.
Unripe seed cones
One or more unripe, female seed cones are visible on the plant. For Pseudotsuga menziesii, an unripe seed cone is green or brown with scales closed together.
Ripe seed cones
One or more ripe, female seed cones are visible on the plant. For Pseudotsuga menziesii, a seed cone is considered ripe when it has turned brown and the scales have begun to spread apart to expose the seeds inside. Do not include empty cones that have already dropped all of their seeds.
Recent cone or seed drop
One or more seed cones or seeds have dropped or been removed from the plant since your last visit. Do not include empty seed cones that had long ago dropped all of their seeds but remained on the plant.
