OregonFlora species comparison

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Euphorbia hypericifolia

Euphorbia cyparissias

cypress spurge
Habit Herbs or subshrubs perennial, 1.5–3(4) dm; stems erect, glabrous.
Leaves

lower leaves alternate, sometimes appearing whorled, linear, 10–30 × 1–3 mm;

margins entire;

tips obtuse to acuminate;

surfaces glabrous, sessile; floral leaves opposite or whorled, broadly ovate, 0.4–1 cm;

margins entire to slightly crenate, sessile.
Inflorescences

involucres bell-shaped, 1–3 mm;

glands 2-horned.
Fruits

oblong, 2.5–3 mm.
Seeds

ellipsoid, 1.5–2 mm; smooth.
2n

=20, 36, 42.

Euphorbia hypericifolia

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

Disturbed areas. Flowering May–Aug. 0–1600 m. BW, CR, ECas, WV. CA, ID, WA; throughout North America; 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. dentata, E. esula, E. helioscopia, E. lathyris, E. myrsinites, E. oblongata, E. peplus, E. spathulata
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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