Might this be siberian?
Leaf has very soft, fuzzy underside
Back of leaf is softly fuzzy
Plot 120839_40 soft leaves .. prickles present on stem .. less hairy stem
15195_70
Found in a moist forest site between a small creek and a roadside.
15195_60
Found at the edge of a moist forest site, near a sidewalk and road. Tendrils on the end of the stems.
Plot 12094_33 leaves smooth from upper side of leaves .. no hairs present on the stem or leaves either .. stem is red from the base and hairy from the base .. square stem