Page authors: Don Knoke, David Giblin
Matricaria discoidea
pineapple weed
WTU specimens
Other herbaria

Distribution: Widely distributed throughout Washington; widely distributed throughout much of North America.

Habitat: Disturbed areas, moist to dry.

Flowers: May-September

Origin: Native

Conservation Status: Not of concern

Description:
General:

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

Leaves:

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

Flowers:

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.

Fruits:

Achene with 2 marginal and 1 ventral nerves.

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

E-Flora BC: Matricaria discoidea atlas page.

CalPhotos: Matricaria discoidea photos.

USDA Plants: Matricaria discoidea information.

15 photographs:
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