Vascular Plants - Apocynaceae - Apocynum:
Apocynum cannabinum
Page Authors: Don Knoke, David Giblin
Indian-hemp 
Blooms: June-September
Habit: herb
Duration: perennial
Origin: Native
Conservation Status: Abundant; of no concern.

Distribution: East of the Cascades in Washington; throughout much of North America.
Habitat: Uncommon in waste ground and lightly-cultivated areas, especially orchards.
Species Description:

General: Glabrous, perennial herbs with milky juice, the simple to branched stems 3-10 dm. tall.
Leaves: 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.
Flowers: 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.
Fruits: Follicles 2, elongate, 12-18 cm. long, sickle-shaped.
Accepted Name:
Apocynum cannabinum L.
Synonyms:
Apocynum cannabinum L. var. glaberrimum A. DC.
Apocynum cannabinum L. var. suksdorfii (Greene) B+g. & Bel.

Treated in Flora of the PNW as:
Apocynum cannabinum vars. glaberrimum & suksdorfii, Apocynum sibiricum var. salignum
Additional Resources:

PNW Herbaria Specimens: View list of Apocynum cannabinum specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Apocynum cannabinum specimens in the WTU Herbarium database.

Washington Flora Checklist: Apocynum cannabinum treatment.

E-Flora BC: Apocynum cannabinum atlas page.

CalPhotos: Apocynum cannabinum images.

USDA Plants Database: Apocynum cannabinum.
Additional photographs of Apocynum cannabinum:
(click on a thumbnail to view larger photo)

Richard Old

Richard Old

Richard Old

Richard Old

Richard Old

Richard Old

Richard Old

G. D. Carr, 2009

G. D. Carr, 2009

G. D. Carr, 2009

G. D. Carr, 2009

G. D. Carr, 2009

G. D. Carr, 2009

G. D. Carr, 2009

G. D. Carr, 2009

Ben Legler, 2009

Ben Legler, 2009

Ben Legler, 2009

Ben Legler, 2009

Ben Legler, 2009
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