Page authors: Don Knoke, David Giblin
Iva axillaris
deeproot, poverty weed

Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains, Great Plains, and Great Lakes region.

Habitat: Dry, often alkaline places, in the valleys, plains and foothills.

Flowers: May-September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Perennial from creeping rhizomes, 1.5-6 dm. tall, aromatic.


Leaves nearly sessile, oblong or obovate to broadly linear, entire, 1-5 cm. long


Heads numerous, on short axillary peduncles, nodding; involucre 2-4 mm. high, it 4-6 bracts attached to each other at the base; corollas all tubular, the pistillate few, greenish, 1 mm. long; staminate flowers greenish, with undivided style, the filaments attached to each other; receptacle small, chaffy throughout; pappus none.


Achenes compressed parallel to the involucral bracts.

Accepted Name:
Iva axillaris Pursh
Publication: Fl. Amer. Sept. 2: 743. 1813.

Synonyms & Misapplications:
Iva axillaris Pursh ssp. robustior (Hook.) Bassett
Additional Resources:

PNW Herbaria: Specimen records of Iva axillaris in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Iva axillaris checklist entry.

E-Flora BC: Iva axillaris atlas page.

CalPhotos: Iva axillaris photos.

USDA Plants: Iva axillaris information.

27 photographs:
Group by