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Comments are encouraged and appreciated. We are amateur botanist, and we do make mistakes sometimes with our identifications. We strive to make this a good identifying resource. All comments are moderated by me and may take several days to appear. This is due to the high number of inappropriate comments that have nothing to do with this subject.

Monday, April 16, 2012

Poison Ivy (Anacardiaceae)

Member of the Cashew Family

Climbing or trailing perennial vine with abundant aerial roots. Leaves: alternate and have 3 leaflets that are mostly flat, ovate to elliptic, entire or often with a few irregular, more or less pointed teeth or shallow lobes, from 2 - 6" long. The inflorescence arises from the lower leaf axils and is loose, branched, panicle-like. 

Flowers: numerous, small, whitish to cream-colored.

Bloom time: May - July. 

Where found: open woods, disturbed areas, lawns. Found throughout TN and likely more prevalent than officially recorded. Extended rage from S. Nova Scotia to se MN south to FL and TX.  Note: leaves and stems contain a severe contact poison that may cause a rash, inflammation, swelling and itching in susceptible individuals.


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