Page authors: Don Knoke, David Giblin
Apocynum androsaemifolium
spreading dogbane
WTU specimens
Other herbaria

Distribution: Throughout Washington and much of Canada and the United States

Habitat: Common on rather dry soil in open areas from low to fairly high elevations

Flowers: June-September

Origin: Native

Conservation Status: Not of concern

Description:
General:

Perennial herbs with milky juice, the freely-branched stems 2-5 dm. tall, glabrous to white-woolly.

Leaves:

Leaves opposite, entire, sub-sessile to petiolate, drooping, oblong-elliptic to ovate, 2.5-7 cm. long, often tipped with a sharp, slender point.

Flowers:

Inflorescence usually a terminal cyme, but often with axillary cymes as well; calyx less than half as long as the corolla, divided about its length, the 5 lobes ovate to lanceolate; corolla pinkish, 5-7 mm. long, from tubular to bell-shaped, the 5 lobes oblong-lanceolate, about the length of the tube, erect to 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, 5-14 cm. long, erect to reflexed.

Accepted Name:
Apocynum androsaemifolium L.

Synonyms:
Apocynum ambigens Greene
Apocynum androsaemifolium L. ssp. pumilum (Gray) Boivin
Apocynum androsaemifolium L. var. pumilum Gray
Additional Resources:

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

WA Flora Checklist: Apocynum androsaemifolium checklist entry.

E-Flora BC: Apocynum androsaemifolium atlas page.

CalPhotos: Apocynum androsaemifolium photos.

USDA Plants: Apocynum androsaemifolium information.

51 photographs:
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