Humulus japonicus
Scientific Name:
Humulus japonicus
Common Name: Japanese hop

Japanese hop is an aggressively invasive vine with short, sharp prickles and pairs of star-shaped leaves. It quickly smothers plants, shrubs and trees on stream banks and floodplains.
Photographer: Flickr user Matthew Beziat, licensed under CC BY-NC 2.0.
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This is a non-native, invasive plant in the U.S.