Euphorbia crenulata |
Euphorbia acuta |
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western wood spurge |
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Habit | Herbs or subshrubs annual or biennial, 1.5–5 dm; stems erect, glabrous. | |
Leaves | elliptic to spatulate, 10–35 mm × 4–12 mm; margins entire to slightly crenate; tips obtuse to acuminate; surfaces glabrous; lower leaves alternate, sessile or with minute petioles; upper and floral leaves opposite or whorled, sessile. |
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Inflorescences | involucres bell-shaped, 2–3 mm; glands 2-horned. |
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Fruits | oblong, 3–3.5 mm. |
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Seeds | round to oblong, 1.5–2.5 mm, with reticulate pitting. |
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Euphorbia crenulata |
Euphorbia acuta |
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Distribution | ||
Discussion | Dry areas. Flowering Apr–Jul. 0–1600 m. Casc, CR, ECas, Est, Sisk, WV. CA, NV; AZ, CO. Native. Euphorbia crenulata greatly resembles the European native E. peplus. They differ only in seed pitting characteristics and lower leaf petioles. Their genetic affinity is worthy of study. |
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Source | Flora of Oregon, volume 2, page 645 Stephen Meyers |
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Sibling taxa | ||
Web links |