Leaves of three...please ID ?

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At any rate i sure do hate the stuff. It has came in bumper crops the past 3 years I believe. And certainly looks to continue that way into this year also. It got in my way of finishing up a cherry tree for my sister a couple days ago. Round up makes some pretty good stuff to kill it.
 
No. Furthermore, there is no poison oak in our area. It is only found in a couple of counties in southern Missouri.

Crushed, it does not smell like poison ivy, either. I'm afraid I have never had any poison oak to try tasting. I don't advocate tasting strange plants. Some of 'em can kill you!

Excellent guess though! Pics I found are very similar.

http://t3.gstatic.com/images?q=tbn:ANd9GcQ1PTvc-2Zz4mp3mP8nquDTvNF8_4usTP0Dwb9R0TzNqBoepQM1
http://4.bp.blogspot.com/_Z4m7jFBYVeg/SdGR6-_Vf-I/AAAAAAAAB-Q/mD0SylS5rn8/s400/Poison+Oak.jpg
http://www.tecnuextreme.com/images/plants/poison_oak1.jpg


Poison oak (Rhus toxicodendron) does not have aerial roots (visible in pics) with "stems never climbing...stems mostly clustered near summit of stem"
 
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Hell, I have no idea. Is it sumac?

Damn you guys are making some good guesses. I presume that you were referring to fragrant sumac, not staghorn sumac?

Fragrant sumac (Rhus aromatica)
Also: http://www.duke.edu/~jspippen/plants/rhus-aromatica060805-4006pnysbndz.jpg


I got thrown out of "Nature" merit badge class at Boy Scouts camp for toting a chunk of fragrant sumac into the class while simultaneously asking "Is this poison ivy?". Of course, I knew it wasn't. The counselor freaked out, falling over a bench trying to get away from me due to his allergy. (screaming all the way, too) You'd think he would know...
 
Yep. Fragrant sumac is definitely not a vine.

I gotta be honest guys...I really don't know what this is. I still have an idea, but I'm not at all sure.

I checked out "pepper vine", and the leaves are very similar, but that plant does not have adhesive tendrils. My plant has little suckers on it just like Virginia creeper.


OK! Nobody guessed poison ivy, which I expected right off the bat. I have ruled that out since there is no prominently longer petiole on the central leaflet.

Some helpful id info: the leaves always appear as a pair (opposite) on alternating attachment points on the woody stem. The bundles of rootlets seem much more prevalent but are always paired on the woody stem.
 
I still think it could be poison ivy but , could also be Viginia Creeper with only 3 leaflets instead of 5? The viney part looks more like Va Creeper the way it's growing?
 
I'm fairly certain it's not cucumber...If you have an idea why not share?

Well...I really didn't want to spoil the opinions of neutral observers with my erroneous ID.

So far, I think it may be a "Grape ivy", Cissus rhombifolia, which is a three leaved ivy generally put into interior plantings due to it's lack of hardiness. No, we are not talking about grapevine, here, either. The plant I am attempting to ID was taken from a heavily landscaped urban area with no exposure to poison ivy.

I have had poor luck finding anything definitive on this plant, and some sources have stated that it is the same thing as Baltic ivy. I am familiar with Baltic ivy, and it isn't this plant.

Mostly, what I am finding are non-technical "plant guide" sort of references, that don't really give differential identification information. Most pictures I have found are similar, but invariable show a prominent petiole (the little stem from the leaflet to it's attachment) and glossy leaves, which my plant does not seem to have.


Some links I have found:

Cissus rhombifolia known as grape and oak-leaf ivy.
PlantFiles: Detailed information on Grape Ivy, Oak Leaf Ivy Cissus rhombifolia
Untitled Page (pics show long petioles not present on my plant)
Cissus rhombifolia Pictures (leaves are different)


BTW: this is almost certainly NOT poison ivy, as the plant came to my attention last week from an employee working in the landscape who is highly allergic to PI. So far: no irritations, so I am assuming it isn't PI or poison oak.
 
I can't say for sure about that. All the pics I have found so far are almost entirely of the flowers, and very little about identifying the plant (taxonomy).

Here is the best pic I have found, and it looks possible, except that these leaves are also on petioles, which are very short on my specimen. I need to return to these plants, since they are rather immature, and the fully grown leaves might be considerably different.

Virgin's Bower (Clematis virginiana)

I'll keep looking for info to see if I can call this a clematis. Looks possible...
 
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