Dieteria canescens
hoary-aster
WTU specimens
Other herbaria

Distribution: East of the Cascades in Washington; southern British Columbia to southern California, east to Saskatchewan and Arizona.

Habitat: Dry, open places in the plains and foothills, occasionally extending into the mountains.

Flowers: July-October

Origin: Native

Conservation Status: Not of concern

Description:
General:

Biennial or short-lived perennial from a tap-root, 1-5 dm. tall, branched and several-stemmed, covered with fine, gray hairs.

Leaves:

Basal leaves linear-oblanceolate to spatulate, up to 10 cm. long including the petiole, and 15 mm. wide, often deciduous; cauline leaves smaller, linear; all leaves toothed, the teeth tipped with small spines.

Flowers:

Heads fairly numerous in an open inflorescence; involucre 6-10 mm. high, often glandular, its bracts imbricate and narrow, papery, except the tip green and sharply recurved; rays 8-25, bright bluish-purple, 5-12 mm. long; pappus of capillary bristles.

Fruits:

Achenes 3-4 mm. long, several-nerved.

Accepted Name:
Dieteria canescens (Pursh) Nutt.
Publication: Trans. Amer. Philos. Soc., n. s. 7: 300. 1840.

Synonyms & Misapplications:
Machaeranthera canescens (Pursh) A. Gray [HC]
Infraspecies:
var. incana – hoary-aster
Additional Resources:

PNW Herbaria: Specimen records of Dieteria canescens in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Dieteria canescens checklist entry.

E-Flora BC: Dieteria canescens atlas page.

CalPhotos: Dieteria canescens photos.

USDA Plants: Dieteria canescens information.

57 photographs:
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