Page authors: Don Knoke, David Giblin
Crepis tectorum
annual hawksbeard, narrow leaf hawksbeard, rooftop hawksbeard
WTU specimens
Other herbaria
WTU images

Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across the northern regions of the U.S. and Canada to the Atlantic Coast.

Habitat: Roadsides, fields, ditches, wastelots, and other disturbed, open areas.

Flowers: June-August

Origin: Introduced from Europe

Conservation Status: Not of concern

Description:
General:

Glabrous annual, 1-10 dm. tall, with milky juice.

Leaves:

Basal leaves petiolate, the blade lanceolate or oblanceolate, finely toothed to pinnately parted, up to 15 cm. long and 4 cm. wide; reduced cauline leaves sessile and auriculate, linear, often involute.

Flowers:

Heads several to numerous, 30-70 flowered; involucre 6-9 mm. high, its inner bracts 12-15, with fine hairs and sometimes with stalked glands as well, the outer bracts about one-third as long; corollas all ligulate, yellow.

Fruits:

Achenes 2.5-4.5 mm. long, dark reddish-brown, spindle-shaped, with 10 ribs.

Accepted Name:
Crepis tectorum L.
Publication: Sp. Pl. 2: 807. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Crepis tectorum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Crepis tectorum checklist entry.

E-Flora BC: Crepis tectorum atlas page.

CalPhotos: Crepis tectorum photos.

USDA Plants: Crepis tectorum information.

5 photographs:
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