OregonFlora species comparison

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Euphorbia thymifolia

Euphorbia esula

(synonym of Euphorbia virgata)

leafy spurge
Habit Herbs or subshrubs perennial, 3–7 dm; stems erect, glabrous and glaucous to sparsely pubescent.
Leaves

lower leaves alternate, narrowly oblong to narrowly oblanceolate, 30–90 × 3–8(10) mm;

margins entire;

tips obtuse to acuminate;

surfaces glabrous, sessile or occasionally short-petiolate; floral leaves opposite or whorled, broadly ovate, 1–1.5 cm;

margins entire to slightly crenate, sessile.
Inflorescences

involucres bell-shaped, 2–3 mm;

glands 2-horned.
Fruits

oblong, 3–3.5 mm.
Seeds

ellipsoid, 2–2.5 mm,
±

smooth.
2n

=16, 20, 48, 60, 64.

Euphorbia thymifolia

Euphorbia esula
Distribution
[BONAP county map]
[BONAP county map]
Discussion

Roadsides, disturbed areas. Flowering May–Jul. 0–1400 m. BW, CR, ECas, Lava, Sisk. CA, ID, NV, WA; throughout US except TX and southeastern states, Mexico; Asia, Europe. Exotic.
Source Flora of Oregon, volume 2, page 645
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. peplus, E. spathulata
Synonyms Euphorbia virgata
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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