Erechtites hieraciifolius - Burke Herbarium Image Collection

Burke Herbarium Image Collection

Vascular Plants, Macrofungi, & Lichenized Fungi of Washington

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Erechtites hieraciifolius

eastern burnweed, eastern fireweed

Image © Richard Old

Specimens

Photos

Distribution: Occasionally introduced west of the Cascades, British Columbia to Oregon

Habitat: Roadside weed

Flowers: August - September

Origin: Native in eastern United States

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bees, flies, beetles, wasps

Description:

General:

Usually glabrous, leafy annual up to 2.5 m. tall.

Leaves:

Leaves numerous, alternate, well distributed along the stem, up to 20 cm. long and 8 cm. wide; sharply serrate; leaves oblanceolate to obovate, the lower short-petiolate, the middle and upper becoming sessile to clasping.

Flowers:

Heads whitish, discoid, several, cylindric, in a flat-topped to elongate inflorescence; involucre 10-17 mm. high, the base swollen, with a single series of equal bracts; corolla narrowly tubular, the outer flowers pistillate, the inner perfect or sterile; style branches flattened.

Fruits:

Achene.

Accepted Name:

Erechtites hieraciifolius (L.) Raf. ex DC.
Publication: Prodr. 6: 294. 1838.

Synonyms & Misapplications:

Erechtites hieracifolia (L.) Raf. ex DC., orthographic variant [HC]

Infraspecies:

var. hieraciifolius – American burnweed

Additional Resources:

PNW Herbaria: Specimen records of Erechtites hieraciifolius in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Erechtites hieraciifolius checklist entry.

OregonFlora: Erechtites hieraciifolius information.

E-Flora BC: Erechtites hieraciifolius atlas page.

CalPhotos: Erechtites hieraciifolius photos.

USDA Plants: Erechtites hieraciifolius information.

3 photographs:

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