Page authors: Don Knoke, David Giblin
Madia glomerata
mountain tarplant, cluster tarweed, mountain tarweed

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

Habitat: Common in dry, open places from sagebrush plains to middle elevations in the mountains.

Flowers: July-September

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bumblebees, bees, beetles, moths


Hairy, glandular annual, 1-8 dm. tall, the stem simple or with a few ascending branches.


Leaves linear or lance-linear, 2-7 cm. long and 1-5 mm. wide.


Heads tightly packed together in a few to many small clusters; involucre spindle-shaped, 6-9 mm. high and 2-4 mm. wide; rays inconspicuous, 2 mm. long, usually 1-3 or wanting; disk flowers several, fertile, yellow, their subtending bracts like those of the ray flowers, which are in a single series and of equal length; pappus none.

Accepted Name:
Madia glomerata Hook.
Publication: Fl. Bor.-Amer. 2: 24. 1834.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Madia glomerata in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Madia glomerata checklist entry

OregonFlora: Madia glomerata information

E-Flora BC: Madia glomerata atlas page

CalPhotos: Madia glomerata photos

55 photographs:
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