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Montana Field Guide

Montana Field Guides

Petty Spurge - Euphorbia peplus
Other Names:  Cancer Weed, Radium Weed

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Non-native Species

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


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Glabrous annual. Stems erect, 10–30 cm, branched in the inflorescence. Leaves alternate, petiolate; blades obovate with rounded tips, entire, 5–25 mm long. Inflorescence a dichotomously branched umbel with leaf-like bracts. Cyathia ca. 1 mm long, glands with attenuate-lunate appendages. Capsule ca. 2 mm long, smooth (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced throughout much of North America; native to Eurasia (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 10

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Relative Density

Recency

 

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



Habitat

Management


References
  • 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.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
    • Stein, G. 2011. Euphorbia 'flowers', an introduction to the amazing Cyathia. https://davesgarden.com/guides/articles/view/3208
  • Web Search Engines for Articles on "Petty Spurge"
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Citation for data on this website:
Petty Spurge — Euphorbia peplus.  Montana Field Guide.  .  Retrieved on , from