The photo above shows the double involucre
of the wild filbert or hazelnut as seen along Road K6000 just above Hellroaring
Ditch on the southeastern flanks of Mt. Adams...........June 12, 2005. The nut develops in the broad sac at the base of the involucre.
The photo above shows a close-up of the leaf
of filbert as seen at Snowking SnoPark along forest road #82.........May
28, 2005. Note the pinnate venation on the simple leaf blade and numerous serrations
along the leaf margin. This species may sometimes be misidentified as an
alder.
Mature fruits of filbert as seen along the Stagman Ridge Trail #12, Mount Adams Wilderness......August 9, 2021.
The photo above shows a leaf and involucre
of the wild filbert or hazelnut as seen along Road K6000 just above Hellroaring
Ditch on the southeastern flanks of Mt. Adams..........June 12, 2005.
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