Page authors: Don Knoke, David Giblin
Soliva sessilis
lawn burrweed, common soliva, prickly soliva
Specimens
Photos

Distribution: Occurring west of the Cascades crest in lowland western Washington; British Columbia to California, also in south-central and southeastern U.S.

Habitat: Disturbed areas, roadsides, and lawn areas at low elevations.

Flowers: March-June

Origin: Introduced from South America

Conservation Status: Not of concern

Description:
General:

Glabrous, taprooted annuals, the stems prostrate to ascending, 2-5 cm. high or across, purplish, often rooting at the nodes.

Leaves:

Leaves basal and cauline, 1-2 cm. long, oblanceolate, pinnati-palmately lobed.

Flowers:

Heads scattered along stems, single in the leaf axils; involucres 2-4 mm. in diameter; corollas all tubular, 1.5-2.5 mm. long, the outer 5-8 pistillate, the inner 4-8 perfect; pappus none.

Fruits:

Achenes obovate to lanceolate, 2.5-3 mm. long, usually winged.

Accepted Name:
Soliva sessilis Ruiz & Pav.
Publication: Syst. Veg. Fl. Peruv. Chil. 113, plate 24. 1798.

Synonyms & Misapplications:
Soliva pterosperma (Juss.) Less.
Additional Resources:

PNW Herbaria: Specimen records of Soliva sessilis in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Soliva sessilis checklist entry.

E-Flora BC: Soliva sessilis atlas page.

CalPhotos: Soliva sessilis photos.

USDA Plants: Soliva sessilis information.

25 photographs:
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