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Montana Field Guide

Montana Field Guides

Summer Spurge - Euphorbia helioscopia
Other Names:  Sun Spurge

Non-native Species

Global Rank: G5
State Rank: SNA
C-value: 1

Agency Status


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General Description
Annual. Stems erect, 20–50 cm, simple or branched below but not above. Herbage glabrous to pilose. Leaves alternate, oblong to spatulate, serrulate,15–30 mm long. Inflorescence a terminal compound umbel with leaf-like bracts, subtended by a whorl of leaves. Cyathia 2–3 mm long, villous, the 4 oval, yellow lobes without appendages. Capsule 2–3 mm long, smooth (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced in eastern and northwest U.S.; native to Eurasia. Known from Flathead and Daniels counties (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 3

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Relative Density



(Observations spanning multiple months or years are excluded from time charts)



  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Summer Spurge — Euphorbia helioscopia.  Montana Field Guide.  .  Retrieved on , from