Humulus japonicus Siebold & Zucc.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Cannabaceae
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Scientific Name
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Description
Species Description - Weedy annual vine; stem and lvs much rougher than in no. 1 [Humulus lupulus L.]; petioles commonly longer than the 5–9-lobed blades; uppermost lvs usually 3–5-lobed; mature pistillate spikes to 2 cm, their bracts relatively small, under 1 cm, densely spinulose-ciliate, dull green, conspicuously and abruptly acuminate, scarcely glandular, releasing the ripe achenes; 2n=32 (pistillate), 34 (staminate). Native of e. Asia, escaped from cult. from N. Engl. to N.C. and Mo. July–Oct.
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Common Names
Japanese hops