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Poison ivy vs. Rubus

Posted by fenix409 Zone 5 (My Page) on
Mon, Jun 22, 09 at 18:08

While checking out the wild raspberries and blackberries that are growing in abundance around our area (Upper Peninsula of Michigan) I noticed what I'm really hoping is NOT poison ivy. From a distance it looks very similar to the rubus species, but then I realized it was growing on a vine. However, after some research I saw that Rubus ursinus can grow on a vine, so I'm wondering if other species of rubus grow on vines and how to tell the difference between these and poison ivy.

The vines I saw were long and trailing, light green and hairy, however the base of the plant was a woody stem with prickers on it (not root-hairs used to attach to trees). The leaves were trifoliate and opposite, not alternating. I did not see any young, reddish leaves. A few of the leaves did have the mitten appearance, though not all of them. Here is a picture of the leaves.

So I guess three questions really: is this poison ivy? Which species of rubus grow on vines? And how can you tell the difference between them and poison ivy? Thanks

Follow-Up Postings:

RE: Poison ivy vs. Rubus

Not poison ivy. The prickers were a good clue - poison ivy doesn't have them.

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