Page authors: Don Knoke, David Giblin
Matricaria discoidea
pineapple weed

Distribution: Widely distributed on both sides of the Cascades crest Washington; Alaska to California, east across North America to the Atlantic Coast.

Habitat: Fields, roadsiides, wastelots, and other disturbed, open areas.

Flowers: May-September

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bees, flies, beetles, wasps


Branching, leafy, pineapple-scented, glabrous annual, 5-40 cm. tall.


Leaves 1-5 cm. long, 1-3 times pinnatifid, the ultimate segments short, linear or filiform.


Heads several or numerous, rayless, the disk 5-10 mm. wide; involucre bracts dry, in two series, with broad translucent margins; disk corollas 4-toothed, yellow; receptacle naked, strongly conic and pointed; pappus a short crown.


Achene with 2 marginal and 1 ventral nerves.

Accepted Name:
Matricaria discoidea DC.
Publication: Prodr. 6: 50. 1838.

Synonyms & Misapplications:
Chamomilla discoidea (DC.) J. Gay ex A. Braun
Chamomilla suaveolens (Pursh) Rydb.
Matricaria matricarioides (Less.) Porter, illegitimate name [HC]
Santolina suaveolens Pursh
Additional Resources:

PNW Herbaria: Specimen records of Matricaria discoidea in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Matricaria discoidea checklist entry.

OregonFlora: Matricaria discoidea information.

E-Flora BC: Matricaria discoidea atlas page.

CalPhotos: Matricaria discoidea photos.

USDA Plants: Matricaria discoidea information.

24 photographs:
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