Euphorbiaceae
Spurge Family
3 genera
20 species
1 subspecies and varieties
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Croton setigerusdoveweed, turkey mullein, fish poison
Distribution: East of the Cascades crest in Washington; Washington south to Baja California.
Habitat: Chiefly in semi-desert conditions, but to the coast in California.
Origin: Native
Flowers: June-August
Euphorbia agrariaurban spurge
Origin: Introduced
Euphorbia amygdaloides
Origin: Introduced
Euphorbia characiasMediterranean spurge
Distribution: Known from scattered counties in lowland western Washington; not reported as occurring elsewhere in North America.
Habitat: Open slopes, rock faces, disturbed open areas.
Origin: Introduced
Flowers: June-July
Euphorbia cyparissiascypress spurge
Distribution: Scattered locations on both sides of the Cascades in Washington; introduced throughout much of North America.
Habitat: Disturbed areas, often where escaped from cultivation.
Origin: Introduced from Eurasia
Flowers: May-August
Euphorbia epithymoides
Origin: Introduced
Euphorbia glyptospermarib seed sandmat, corrugate seeded spurge, ridge seeded spurge
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to Maine and Texas.
Habitat: Dry, sandy soil, from the plains to the lower mountains.
Origin: Native
Flowers: June-September
Euphorbia helioscopiamad woman's milk, summer spurge, sun spurge, wart spurge, wartweed
Distribution: Introduced chiefly west of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Weed of cultivated areas and abondoned gardens.
Origin: Introduced from Eurasia
Flowers: April-July
Euphorbia lathyrismole plant, gopher plant, caper spurge
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California and Arizona, widely distributed in eastern North America.
Habitat: Disturbed soil and wasteland.
Origin: Introduced from Eurasia
Flowers: April-May
Euphorbia maculatasandmat, milk spurge, spotted spurge
Distribution: Occurring on both sides of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Disturbed soil and waste areas.
Origin: Introduced from eastern North America
Flowers: June-September
Euphorbia myrsinitesbroad leaved glaucous spurge, myrtle spurge
Distribution: Chiefly east of the Cascades in Washington; Washington south to California, east to Colorado and New Mexico; reported from Ottawa and Minnesota.
Habitat: Disturbed areas often arid areas or dry soils.
Origin: Introduced from Mediterranean
Flowers: April-July
Euphorbia oblongatabalkan spurge, egg leaf spurge
Distribution: Occurring in a few counties in lowland western Washington; Washington to California.
Habitat: Disturbed, open areas, including roadsides and wastelots
Origin: Introduced from Europe
Flowers: May-July
Euphorbia pepluspetty spurge
Distribution: Occurring chiefly west of the Cascades in Washington; widely distributed throughout much of North America except central U.S.
Habitat: Weed of disturbed ground.
Origin: Introduced from Europe
Flowers: May-November
Euphorbia platyphyllosbroad leaved spurge
Origin: Introduced from Europe
Euphorbia segetalis
Origin: Introduced
Euphorbia serpillifoliathyme leaved spurge
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to Baja California, east to Alberta and Texas.
Habitat: Dry ground from the plains to the lower mountains.
Origin: Native
Flowers: May-September
Euphorbia serrulataupright spurge
Origin: Introduced from Europe
Euphorbia spathulatareticulate seeded spurge, spatulate leaved spurge, warty spurge
Origin: Native
Flowers: May - July
Euphorbia virgatawolf's milk, leafy spurge
Distribution: Introduced in much of the United States, except Oklahoma to Virginia and south; mostly eastern Washington, Idaho and Montana in the Pacific Northwest
Habitat: Noxious weed of disturbed soils
Origin: Introduced
Flowers: May - June
Mercurialis annuaannual mercury
Origin: Introduced