Page authors: Don Knoke, David Giblin
Pyrrocoma liatriformis
Palouse goldenweed

Distribution: Occurring east of the Cascades crest in eastern Washington; eastern Washington and adjacent Idaho.

Habitat: Grassy hillsides and prairies.

Flowers: July-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Threatened in Washington (WANHP)

Pollination: Bumblebees, bees, butterflies, flies, wasps


Perennial from a stout taproot, the stems solitary or several, 3-7 dm. tall, sometimes curved at the base; herbage hairy.


Leaves entire or with a few sharp teeth, the basal ones tufted, oblanceolate or narrowly elliptic, 7-25 cm. long and 1-3 cm. wide, the cauline leaves somewhat reduced upward, becoming sessile.


Heads several to many in an elongate inflorescence, the disk up to 2 cm. wide; involucre 10-16 mm. high, its firm, pointed bracts green-tipped or green throughout; rays 13-21, 6-10 mm. long, yellow; disk corollas 7-10 mm. long, yellow; pappus of grayish, uneven, capillary bristles.


Achenes elongate.

Accepted Name:
Pyrrocoma liatriformis Greene
Publication: Leafl. Bot. Observ. Crit. 2: 17. 1909.

Synonyms & Misapplications:
Haplopappus integrifolius Porter ex A. Gray ssp. liatriformis (Greene) H.M. Hall
Haplopappus integrifolius Porter ex A. Gray ssp. scaberulus (Greene) H.M. Hall
Haplopappus liatriformis (Greene) H. St. John [HC]
Haplopappus racemosus (Nutt.) Torr. ssp. liatriformis (Greene) D.D. Keck
Additional Resources:

PNW Herbaria: Specimen records of Pyrrocoma liatriformis in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Pyrrocoma liatriformis checklist entry.

OregonFlora: Pyrrocoma liatriformis information.

E-Flora BC: Pyrrocoma liatriformis atlas page.

CalPhotos: Pyrrocoma liatriformis photos.

USDA Plants: Pyrrocoma liatriformis information.

5 photographs:
Group by