Montana Field Guide

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- Kingdom - Plants - Plantae
  - Division - Flowering Plants - Anthophyta
    - Class - Dicots - Dicotyledoneae
      - Order - Spurge - Euphorbiales
        
        Family - Spurge Family - Euphorbiaceae
        
        Species - Geyer's Spurge - Euphorbia geyeri

Geyer's Spurge - Euphorbia geyeri

Other Names: Chamaesyce geyeri

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Undetermined Origin

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

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General Description

Glabrous annual. Stems prostrate, 5–45 cm. Leaves opposite, oblong-ovate, obtuse to emarginate at the tip, rounded at the base, entire, 4–12 mm long. Inflorescence: solitary cyathia in leaf axils. Cyathia 1–1.5 mm long; glands with white to reddish margins. Capsule 1–2 mm long; seeds smooth (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments

MT to WI, south to NM, TX. Reported for Custer County (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database

Number of Observations: 5

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Relative Density

Recency

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

Habitat

Sandy soil of grasslands, sagebrush steppe; plains (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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
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Citation for data on this website:
Geyer's Spurge — Euphorbia geyeri. Montana Field Guide. Montana Natural Heritage Program. Retrieved on April 16, 2024, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=PDEUP0D0Y0