Page authors: Don Knoke, David Giblin
Apocynum ×floribundum
western dogbane
WTU specimens
Other herbaria

Distribution: Both sides of the Cascades in Washington; widespread throughout North America.

Habitat: Dry, open areas at low elevations.

Flowers: June-September

Origin: Native

Conservation Status: Not of concern

Description:
General:

Perennial herbs with milky juice, the branched stems 2-6 dm. tall, glabrous or pubescent.

Leaves:

Leaves opposite, entire, spreading, sub-sessile to petiolate, ovate-lanceolate to ovate, obtuse to acute at the tip and rounded to cordate at the base, 4-8 cm. long.

Flowers:

Inflorescence of terminal and axillary cymes; calyx divided nearly to the base, the 5 lobes lanceolate, about as long as the corolla tube; corolla 4.5-6 mm. long, bell-shaped, pinkish, the 5 lobes spreading; 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, 7-14 cm. long, pendulous.

Accepted Name:
Apocynum ×floribundum Greene
Publication: Erythea 1(7): 151. 1893.

Synonyms & Misapplications:
Apocynum medium Greene [HC, KZ99]
Additional Resources:

PNW Herbaria: Specimen records of Apocynum ×floribundum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Apocynum ×floribundum checklist entry.

E-Flora BC: Apocynum ×floribundum atlas page.

CalPhotos: Apocynum ×floribundum photos.

USDA Plants: Apocynum ×floribundum information.

3 photographs:
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