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Poison-oak
Summer photo - often green
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Poison oak trunk
Huge poison oak. 4" diameter trunk: Near 160' tall. This is on Hiouchi Trail: Jedediah Smith Redwoods State Park
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Poison-oak
Vine in a Southern Oregon oak tree. Green leaves here are oak
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Poison-oak
Early autumn - with fruit capsules
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Poison-oak
As ground cover: Collings Mountain trail. Large leaves in shade.
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Poison-oak
Columbia River Gorge. Summer image. Leaflets of 3 leaves
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Poison-oak
Close-up of fruit / seed capsules
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Poison-oak
Capsules can cause rash
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POISON-OAK
Poison-oak twigs can angle upward, but may not be present
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POISON-OAK
Especially in full sun, twig ends may appear fuzzy: blunt buds
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POISON-OAK
A bud from the shade, not blunt, but not as pointed at Rhibes / currant
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FLOWERING CURRANT
Rhibes sanguinium: also with short upward angle twigs. But the buds can be very pointed.
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FLOWERING CURRANT
No way to confuse with poison-oak with spring flowers. But both species hold bare flowers stalks in winter
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Poison-oak leaflet
Redwood forest in autumn. The phrase "leaves of 3" won't help when you see one colorful leave on the ground. No distinct lobes either.
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Poison-oak leaflet
When I saw these in the redwood forest, no shrubs were in sight. Vines were about 80 feet way, with fall color high up.
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Poison-oak leaf
This one fell with all 3 leaflets intact.
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Vine on Douglas fir
A 2" diameter poison-oak vine next to a Douglas fir tree on Hatton trail in the redwood forest.
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Poison-oak vine
This vine had a stem diameter of about 2". The autumn foliage here is about 120' up the tree.
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Poison-oak vine
Redwood forest in autumn: smaller vines growing on a redwood tree.
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Poison-oak stem
Found this cut poison-oak vine on a fallen tree. Almost 70 growth rings: near 2" in diameter.
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