UW Burke Herbarium species comparison

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Euphorbia maculata

Euphorbia cyparissias

sandmat, milk spurge, spotted spurge

cypress spurge
Habit Monoecious, ascending to erect annual, the stems freely-branched, 1-5 dm. tall, white-woolly below and glabrous above. Glabrous perennial, the stems 1.5-3 dm. tall, simple below but freely branched 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.

Leaves alternate, the lower ones linear, 1-3 cm. long and 1-3 mm. broad;

leaves of the axillary upper branches more numerous and narrower.
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.

Inflorescence a many-rayed umbel, the floral bracts broadly ovate-cordate, 12-16 mm. long;

flowers tiny, monoecious, borne in involucres; staminate flowers numerous, naked, each consisting of a single stamen; pistillate flower single and terminal in the involucre;

involucres about 3 mm. long, bearing 4 reddish-green, horned glands.
Fruits

Capsules 2 mm. long;

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

Capsules finely warty, separating into three 1-seeded segments.

Euphorbia maculata

Euphorbia cyparissias
Flowering time June-September May-August
Habitat Disturbed soil and waste areas. Roadsides, fields, ditches, wastelots, and other disturbed areas where often escaped from cultivation.
Distribution
Occurring on both sides of the Cascades in Washington; British Columbia to California, east across North America to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east across much of North America to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Introduced from eastern North America Introduced from Eurasia
Conservation status Not of concern Not of concern
Sibling taxa
E. agraria, E. amygdaloides, E. characias, E. cyparissias, E. epithymoides, E. glyptosperma, E. helioscopia, E. lathyris, E. myrsinites, E. oblongata, E. peplus, E. platyphyllos, E. segetalis, E. serpillifolia, E. serrulata, E. spathulata, E. virgata
E. agraria, E. amygdaloides, E. characias, E. epithymoides, E. glyptosperma, E. helioscopia, E. lathyris, E. maculata, E. myrsinites, E. oblongata, E. peplus, E. platyphyllos, E. segetalis, E. serpillifolia, E. serrulata, E. spathulata, E. virgata
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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