Page authors: Don Knoke, David Giblin
Erigeron compositus
cutleaf daisy, dwarf mountain fleabane, fernleaf fleabane, trifid mountain fleabane

Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the northern Great Plains, also in northern and eastern Canada.

Habitat: Sandy riverbanks at low elevations to rocky outcrops at mid- to high elevation in the mountains

Flowers: May - August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, butterflies, flies, apomixis?


Perennial from a tap-root, 3-25 cm. tall, the herbage densely glandular.


Basal leaves trifid to ternately dissected; cauline leaves few, linear and entire.


Heads solitary on long, nearly leafless stems, glandular and hairy; pistillate flowers 20-60, with usually white but occasionally pink or blue rays up to 12 mm. long and 2 mm. wide, or wanting; disk flowers yellow; pappus of 12-20 capillary bristles.

Accepted Name:
Erigeron compositus Pursh
Publication: Fl. Amer. Sept. 2: 535. 1813. 1813.

Synonyms & Misapplications:
Erigeron compositus Pursh var. compositus [HC]
Erigeron compositus Pursh var. discoideus A. Gray [HC]
Erigeron compositus Pursh var. glabratus Macoun [HC]
Erigeron trifidus Hook., misapplied [HC2]
Additional Resources:

PNW Herbaria: Specimen records of Erigeron compositus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Erigeron compositus checklist entry.

OregonFlora: Erigeron compositus information.

E-Flora BC: Erigeron compositus atlas page.

CalPhotos: Erigeron compositus photos.

USDA Plants: Erigeron compositus information.

93 photographs:
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