Page authors: David Giblin, Don Knoke
Cannabis sativa
hemp, marihuana

Distribution: Introduced in much of the United States

Habitat: Illegal plantings in openings in the forests

Flowers: June - September

Origin: Introduced

Conservation Status: Not of concern


Dioecious, annual herbs from a taproot, the stems erect, 0.2-6 m. tall, simple to well-branched.


Leaves palmately compound, with petioles 2-7 cm. long; blades of leaflets 3-9, linear to linear-lanceolate, 3-15 cm. long and 0.2-1.7 cm. wide, the margins serrate, the surfaces with yellowish-brown, resinous dots.


Staminate inflorescences paniculate, erect, with numerous flowers; sepals 5, greenish, ovate to lanceolate, 2.5-4 mm. long; stamens 5, opposite the sepals; pistillate flowers on congested pseudospikes, sessile, enclosed by glandular, beaked bracteoles; perianth appressed to the base of the ovary.


Achenes ovoid, 2.5 mm. long, white or greenish, mottled with purple.

Accepted Name:
Cannabis sativa L.
Publication: Sp. Pl. 2: 1027. 1753. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Cannabis sativa in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Cannabis sativa checklist entry.

E-Flora BC: Cannabis sativa atlas page.

CalPhotos: Cannabis sativa photos.

USDA Plants: Cannabis sativa information.

8 photographs:
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