hi, i live in sw pa. need an id on a vine i discovered while battling a russian olive in scrubby woods next to my property. ("woods" have sassafras, bush honeysuckle, raspberry, ash, pin cherry, wild grape, grandiflora rose, russian olive,etc.) it can climb, but is mostly on the ground. it has 5", slightly irregular, but not toothed, oval leaves with veins arranged similar to a dogwood leaf; medium green and rather tender. tendrils like a clematis at leaf axis' which are in pairs every 3-4". it has spines/thorns like a raspberry along the stem but smaller and fewer. do not know seasonal info about blooms etc. since i just saw it. searched online of course. any info appreciated!