Humulus lupulus var. lupuloides E.Small
Family: Cannabaceae
common hop, hop
[Humulus americanus Nutt.,  more...]
Humulus lupulus var. lupuloides image
from USDA Plants website  
Etymology: Humulus: Latin name of uncertain origin, may have descended from Low German word humela, hop; which is the common name of this genus placed by Munz in the Moraceae or mulberry family, but moved by Jepson along with Cannabis into the new family Cannabaceae.
Plants: perennial herbaceous vine
Conservation Status: Native