Can anyone confirm?

It does not look like poison ivy to me.

Me either.

Check out the fifth picture on this page:

http://www.poison-ivy.org/unus...

I haven't seen poison ivy look like that but I would treat it with caution. Is there any more "conventional" looking poison ivy close by?

sooby said:Check out the fifth picture on this page:

http://www.poison-ivy.org/unus...

I haven't seen poison ivy look like that but I would treat it with caution. Is there any more "conventional" looking poison ivy close by?

Good advice.

I noted that it had unconventional toothed leaves, but I was reading that there are variants with such leaves. No, as far as I know, there are no other poison ivy plants around. I have no idea where this came from...

Are there any other viable candidates for this plant? I'm thinking I will likely remove it with caution no matter what.

To try and ID it can you check without touching it whether the compound leaves are opposite or alternate and confirm whether it is growing in the wild, a weed in a garden or some other situation? If there 's no other poison ivy, is there any more of this plant with toothed leaf edges?

Looks like a kind of Cissus to me. Cissus rhombifolia?

In the top picture the leaves appear to be alternate. Assuming a wild plant that, according to my field guide, narrows it down to poison ivy or possibly fragrant sumac (Rhus aromatica). None of the other alternate leaved plants with three leaflets that fit can be vines. The long petiole on the end leaflet of poison ivy is long, the end leaflet on fragrant sumac tapers towards its base. In the ID plant that distinction is rather ambiguous. Another difference is that poison ivy produces aerial rootlets whereas fragrant sumac does not. Since we can't see the older stems in the pictures that's something you could look for lower down on the stem.

Cissus rhombifolia would not be growing wild in Quebec. Edited to add there is a Cissus incisa but it doesn't look like a match and the range given in my field guide does not go as far north as Quebec. It differs from poison ivy also in not having aerial roots.

Poison ivy has smooth and glossy leaves. The plant in question has neither. The vein structure is also different between the two.

I think it is just Boston ivy (Parthenocissus tricuspidata)
http://landscaping.about.com/o...

According to this Michigan State University page poison ivy leaves can be shiny or dull but I must admit the ID plant doesn't look smooth although nor does the poison ivy with teeth in the earlier link above. Parthenocissus tricuspidata apparently rarely naturalizes (at least in the north) and I haven't seen it listed as having done so in Quebec. It could have been planted though. I do see P. quinquefolia naturalized around here regularly but have never seen P. tricuspidata other than in gardens and then not very often.

http://msue.anr.msu.edu/news/i...

Interesting possibility though, I didn't realize the leaves were trifoliate in younger plants and became simple but lobed on older plants. For some reason my field guide completely ignored Parthenocissus even though P. quinquefolia is common in this area (can see Quebec from higher ground just up the road).

I should clarify that this plant was not planted, and was not present last summer.

I am allergic to poison ivy I live with it most of the summer. I get it in little spots here and there on my arms and fingers if I'm not sure what it is I would just touch it to my forearm and see if I get it. Now I wouldn't do that if you are the type of person that has to go to the hospital when you get it. If you get a small rash on your forearm just get some Benadryl lotion and rub on it. Just a suggestion

Parthenocissus tricuspidata - no question. Good call, Rick.

sLOVEnia rocks...

mrperrier said:I should clarify that this plant was not planted, and was not present last summer.

Is there any Boston ivy growing in the vicinity, such as on a house wall?

Here is a picture from my yard. Plant in the middle is poison ivy. Most of the plants around it are just Boston ivy. Lots of Boston ivy tries to grow around here and I am yanking it out.

Rita, that's Virginia creeper because it has five leaflets. Boston ivy either has three leaflets or a single leaf with three lobes. Both are Parthenocissus though (P. quinquefolia versus P. tricuspidata).

sooby said:Rita, that's Virginia creeper because it has five leaflets. Boston ivy either has three leaflets or a single leaf with three lobes. Both are Parthenocissus though (P. quinquefolia versus P. tricuspidata).

Oh yes, now I realize you are of course right. Don't know what I was thinking calling it Boston Ivy. The Virginia Creeper grows on the back of my neighbors garage.