About

Humulus japonicus is a species of flowering plant in family Cannabaceae. This ornamental plant is sometimes referred to by the common name Japanese hops. Originally native to East Asian countries such as China, Japan, Korea, and extending its habitat to Vietnam, it was imported to North America in the late 19th century as an ornamental.

Since its arrival in North America, it has spread widely. It can be found throughout the Northeastern U.S. and eastern Canada, and considered an invasive species in North America. It also features on the list of invasive alien species of Union concern since 2019. This means it can no longer be imported in the European Union. Additionally, it has become illegal to plant it, breed it, transport it, or bring it into the wild in all Member States.

Where it grows

Humulus japonicus is native to temperate parts of Asia (China, Japan, Korea, Taiwan and the Russian Far East) and the tropical environment of Vietnam and Laos, but has become an invasive species in North America since it was imported in the late 19th century.

Uses

The plant was introduced into America in the 19th century both as an ornamental and raw ingredient for the Asian tonic. In traditional Chinese medicine this herb known as lü cao is used rather uncommonly, with supposed diuretic and heat-cooling effects.

Other Humulus plants

Common hop · Hop