Page author: Don Knoke
Hieracium lachenalii
common hawkweed, English hawkweed, European hawkweed
WTU specimens
Other herbaria

Distribution: Uncommon introduction west of the Cascades in Washington and Oregon

Habitat: Disturbed areas

Flowers: June - August

Origin: Introduced from Europe

Conservation Status: Not of concern

Description:
General:

Perennials with milky juice from a short rhizome, the stems 30-60 cm. tall, with stiff hairs below and stellate-pubescence and stalked glands above.

Leaves:

Leaves mostly basal, lance-elliptic to lanceolate, entire or more or less dentate, 5-10 cm. long and 1-5 cm. wide, the bases usually wedge-shaped; cauline leaves often mottled with purple.

Flowers:

Heads 3-9 in a flat-topped inflorescence, the peduncles and involucres stellate-pubescent and stipitate-glandular; involucres 8-10 mm. high, the bracts pointed; flowers 40-80, all ligulate, yellow, 13-18 mm. long; pappus of straw-colored, capillary bristles.

Fruits:

Achenes columnar, 2.5-3 mm. long.

Accepted Name:
Hieracium lachenalii C.C. Gmel.

Synonyms & Misapplications:
Hieracium vulgatum Fr., misapplied [FNA19, HC]
Additional Resources:

PNW Herbaria: Specimen records of Hieracium lachenalii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Hieracium lachenalii checklist entry.

E-Flora BC: Hieracium lachenalii atlas page.

CalPhotos: Hieracium lachenalii photos.

USDA Plants: Hieracium lachenalii information.

29 photographs:
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