Page author: David Giblin
Corispermum pacificum
Pacific bugseed
Specimens
Photos

Distribution: Occurring along the Columbia River and east of the Cascades in Washington; southwestern Washington to northern Oregon, east to west-central Idaho; also in southwestern British Columbia.

Habitat: Dunes and sandy shorelines of desert areas and riverbanks.

Flowers: August-October

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Wind

Description:
General:

Spreading-erect annual, freely-branched especially near the base, the stems up to 6 dm. tall, often reddish-tinged, the herbage often covered with stiff, stellate hairs.

Leaves:

Leaves alternate, entire, linear to linear-lanceolate, 1-5 cm. long and up to 4 mm. broad, tipped with a sharp point, narrowed to short petioles.

Flowers:

Plant floriferous nearly throughout; flowers in short, axillary, crowded, bracteate spikes 1-3 cm. long and 4-6 mm. thick; bracts lanceolate below, broader above, 5-9 mm. long; perianth a single, papery scale opposite the bract; stamens 3-5, exerted; styles 2.

Fruits:

Fruit obovate to orbicular, 3-4 mm. long, strongly flattened and winged.

Accepted Name:
Corispermum pacificum Mosyakin
Publication: Novon. 5: 345, fig. 1A. 1995.

Synonyms & Misapplications:
Corispermum hyssopifolium L., misapplied [FNA4, HC]
Additional Resources:

PNW Herbaria: Specimen records of Corispermum pacificum in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Corispermum pacificum checklist entry

OregonFlora: Corispermum pacificum information

E-Flora BC: Corispermum pacificum atlas page

CalPhotos: Corispermum pacificum photos

20 photographs:
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