Pacific poison oak is extremely common in California, much like its cousin poison ivy in the eastern half of the country.
Poison Ivy
Poison Oak
Poison Sumac
Information about poison ivy, oak, sumac and the skin rashes they cause
The Blog
Here is a case where poison ivy has climbed a white birch tree, which makes the hairy roots really stand out.
This is not something we have seen often, PI climbing a white birch.
February 24, 2019 - 11:28am
I'll be honest. As a person somewhat obsessed with poison ivy, you would think I would always be able to spot it in any season, in any form of growth.
February 18, 2019 - 11:56am
Umar Mycka is one of the few people around that knows more about poison ivy than the crazy folks behind THIS website.
February 11, 2019 - 8:29pm
Normally you would not expect to see poison ivy growing out of icy swamp water.
But all these vines, from the big 2-incher to the tiny 1/4 incher are all poison ivy.
February 4, 2019 - 7:47pm
Here is a pretty scary image of a poison ivy vine "exploding" at the top of a dead tree.
When the vine can't find anything else to climb on it starts reaching in all directions, either for another climbing surface or for sun.
January 2, 2019 - 6:09pm
The folks from Green+ products contacted us to let us know that their skin cream products are very helpful for poison ivy rash.
December 13, 2018 - 1:50pm
I noticed this house recently with a spectacular maple tree in full color behind it.
But then noticed the equally colorful leaves on a vine growing on a pine tree. And guess what?
November 8, 2018 - 10:30am
Here is yet another example of poison ivy exposing itself with fall color.
This hedge near our headquarters has had poison ivy growing up through it all summer, but we only noticed it when it turned bright color.
October 31, 2018 - 5:43pm
Here is another example of how poison ivy's less harmful cousin, Virginia creeper, also turns colorful in the fall.
October 26, 2018 - 11:27am
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