Page authors: Don Knoke, David Giblin
Euphorbia maculata
sandmat, milk spurge, spotted spurge
Specimens
Photos

Distribution: Occurring on both sides of the Cascades in Washington; British Columbia to California, east across North America to the Atlantic Coast.

Habitat: Disturbed soil and waste areas.

Flowers: June-September

Origin: Introduced from eastern North America

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bees, wasps

Description:
General:

Monoecious, ascending to erect annual, the stems freely-branched, 1-5 dm. tall, white-woolly below and glabrous above.

Leaves:

Leaves opposite, short-petiolate, oblong or oblong-lanceolate, 1-3 cm. long and 4-9 mm. wide, with long, soft hairs; stipules triangular, 1 mm. long.

Flowers:

Inflorescence of cymes terminal on the branches, the flowers tiny, monoecious, borne in involucres; staminate flowers numerous, naked, each consisting of a single stamen; pistillate flower single and terminal in the involucre; involucre obconic, 1.5 mm. long, bearing 4 glands separated by reniform appendages, white or pink, entire, 0.2-0.4 mm. long.

Fruits:

Capsules 2 mm. long; seeds golden-brown, 1.3 mm. long, flattened and shallowly pitted between the 3 or 4 rounded, longitudinal ridges.

Accepted Name:
Euphorbia maculata L.
Publication: Sp. Pl. 1: 455. 1753.

Synonyms & Misapplications:
Chamaesyce maculata (L.) Small [KZ99]
Euphorbia supina Raf. [HC]
Additional Resources:

PNW Herbaria: Specimen records of Euphorbia maculata in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Euphorbia maculata checklist entry

OregonFlora: Euphorbia maculata information

E-Flora BC: Euphorbia maculata atlas page

CalPhotos: Euphorbia maculata photos

25 photographs:
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