Page authors: Don Knoke, David Giblin
Humulus lupulus
WTU specimens
Other herbaria
WTU images

Distribution: Occasionally escaping from cultivation, but rarely becoming established in Washington; occasionally escaped from cultivation in many areas in North America.

Habitat: Waste ground.

Flowers: July-August

Origin: Introduced

Conservation Status: Not of concern

Description:
General:

Dioecious, twining, herbaceous, perennial vines from rhizomes, the stems rough, up to 6 m. long.

Leaves:

Leaves opposite, deeply 3- to 5-lobed, the blades cordate-based, scabrous, strongly serrate, 4-10 cm. long.

Flowers:

Staminate flowers in panicles in axillary inflorescences; perianth segments 5, distinct, opposed by 5 stamens; pistillate inflorescences cylindric-ovoid, greenish-yellow, 3-5 cm. long, with yellow glands; pistillate flowers in pairs in bracteate spikes, the bracts entire, hiding the flowers; styles 2.

Fruits:

Achenes hidden by the bracts.

Accepted Name:
Humulus lupulus L.
Publication: Sp. Pl. 2: 1028. 1753.

Synonyms & Misapplications:
(none provided)
Infraspecies:
var. neomexicanus – hops
Additional Resources:

PNW Herbaria: Specimen records of Humulus lupulus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Humulus lupulus checklist entry.

E-Flora BC: Humulus lupulus atlas page.

CalPhotos: Humulus lupulus photos.

USDA Plants: Humulus lupulus information.

11 photographs:
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