Hop Plant- wikimedia
Name: Humulus lupulus

Distribution: Originated in China, now worldwide

Medicinal Use: the resinous flower is used as treatment for anxiety, restlessness and insomnia.
Hops is used widely in making beer because it suppresses bacterial growth thus favoring the growth of brewers yeast.

The lignans in hops function similarly to adenosine. Adenosine is an inhibitory neurotransmitter that promotes sleep. Hops works like melatonin, a hormone that controls the body clock.