OregonFlora species comparison

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Euphorbia heterophylla

Euphorbia peplus

petty spurge
Habit Herbs annual, 1–4(5) dm; stems erect, glabrous.
Leaves

lower leaves alternate, elliptic to obovate, 15–30 × 5–15 mm;

margins entire;

tips obtuse;

surfaces glabrous, petiolate; upper and floral leaves opposite or whorled; round to rhombic-ovate, 0.5–1.5 cm, sessile or with short petioles.
Inflorescences

involucres bell-shaped, 1–1.5 mm;

glands 2-horned.
Fruits

spherical, 1.5–3 mm.
Seeds

oblong, 1–1.5 mm, with rows of large pits.

Euphorbia heterophylla

Euphorbia peplus
Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Disturbed areas. Flowering Feb–Aug. 0–900 m. Col, CR, Est, Lava, Sisk, WV. CA, ID, NV, WA; scattered throughout North America; Europe. Exotic.
Source Flora of Oregon, volume 2, page 646
Stephen Meyers
Sibling taxa
E. crenulata, E. cyparissias, E. dentata, E. esula, E. helioscopia, E. lathyris, E. myrsinites, E. oblongata, E. peplus, E. spathulata
E. crenulata, E. cyparissias, E. dentata, E. esula, E. helioscopia, E. lathyris, E. myrsinites, E. oblongata, E. spathulata
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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