Plant ID forum: Poisonous?

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Smaddock
May 12, 2016 6:09 PM CST
I got a nasty rash from the back bush wondering what this is and if it could be the culprit.
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[Last edited by Smaddock - May 12, 2016 6:22 PM (+)]
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Name: Lauri
North Central Washington (Zone 5b)
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lauribob
May 12, 2016 6:11 PM CST
Welcome Smaddock. Do you have a photo? Where in the world are you?
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Smaddock
May 12, 2016 6:22 PM CST
Sorry, upload didn't work I am in Southern Ontario developed a rash similar to poison ivy/oak. Wondering if this is the plant. One is of the plant, has an odd leaf that has two indents on the top, and the other is of the flower, a little purple.
Thumb of 2016-05-13/Smaddock/d3cff7
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Name: Sue
Ontario, Canada (Zone 4a)
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sooby
May 12, 2016 6:38 PM CST
It looks like blue cohosh, Caulophyllum thalictroides. Funnily enough I was looking as some in woodlands here earlier today. According to some references it can cause contact dermatitis in some people.

Edited to add, where I saw it there was also a lot of poison ivy so if it's the same where you are then it might not necessarily have been the blue cohosh.
[Last edited by sooby - May 12, 2016 6:40 PM (+)]
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Name: Lin
Florida (Zone 9b)
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plantladylin
May 12, 2016 6:55 PM CST
Database information says the leaves and seeds of Blue Cohosh (Caulophyllum thalictroides) are poisonous but mentions nothing about contact dermatitis. I too wonder if perhaps Poison Ivy (Toxicodendron radicans) might be growing amongst the Blue Cohosh or somewhere very close by?
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Name: Lin
Florida (Zone 9b)
Region: United States of America Morning Glories Region: Florida Houseplants Charter ATP Member I was one of the first 300 contributors to the plant database!
Garden Procrastinator Birds Butterflies Bee Lover Hummingbirder Container Gardener
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plantladylin
May 12, 2016 6:56 PM CST
Oh my ... where are my manners, I forgot to say Welcome!
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Name: Sue
Ontario, Canada (Zone 4a)
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sooby
May 12, 2016 6:59 PM CST
Here's one of the references, this one specifies the roots which you're not likely to contact by just walking by, other articles don't specify the offending plant part and just make a general comment about contact dermatitis.

http://www.ct.gov/caes/lib/caes/documents/publications/fact_...

Smaddock
May 12, 2016 7:08 PM CST
Thank you for all of the great information! The plant is very close to blue cohosh when compared to the pictures. I will take a look during daylight to be sure and rule that one out. I will be back with more pictures of anything else I find. Thank you guys so much.

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