Page authors: Don Knoke, David Giblin
Apocynum cannabinum
clasping-leaved dogbane, common dogbane, hemp dogbane

Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.

Habitat: Stream banks, moist hillsides and forest openings, fields, and wastelots at low to middle elevations.

Flowers: June-September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bumblebees, bees, flies, butterflies, beetles, wasps


Glabrous, perennial herbs with milky juice, the simple to branched stems 3-10 dm. tall.


Leaves opposite, entire, yellowish-green, erect to ascending, oblong-ovate to lanceolate, rounded but with a sharp, slender point, 5-11 cm. long, short-petiolate and acute to rounded or sub-cordate at the base.


Inflorescence of both terminal and axillary cymes, the leafy branches of the lateral cymes extending above the terminal cyme; calyx divided nearly to the base, the 5 lobes lanceolate; corolla 2-4 mm. long, whitish to greenish-white, broadly tubular, the 5 lobes nearly erect; there are triangular, awl-shaped appendages alternate with the bases of the 5 stamens in the corolla tube; style very short, enlarged; ovary superior.


Follicles 2, elongate, 12-18 cm. long, sickle-shaped.

Accepted Name:
Apocynum cannabinum L.
Publication: Sp. Pl. 1: 213. 1753.

Synonyms & Misapplications:
Apocynum cannabinum L. var. glaberrimum A. DC. [HC]
Apocynum cannabinum L. var. suksdorfii (Greene) Bég. & Beloserky [HC]
Apocynum sibiricum Jacq. [HC]
Apocynum sibiricum Jacq. var. salignum (Greene) Fernald [HC]
Additional Resources:

PNW Herbaria: Specimen records of Apocynum cannabinum in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Apocynum cannabinum checklist entry

OregonFlora: Apocynum cannabinum information

E-Flora BC: Apocynum cannabinum atlas page

CalPhotos: Apocynum cannabinum photos

47 photographs:
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