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Montana Field Guides

Small-flowered Evening-primrose - Camissonia minor
Other Names:  Oenothera minor

Potential Species of Concern
Native Species

Global Rank: G4
State Rank: S3S4

Agency Status


External Links

General Description
Taprooted annual. Stems slender, erect, 5–20 cm, branched from the base. Herbage glabrate, glandular above. Leaves petiolate, mostly basal; the blade oblanceolate, 1–5 cm long. Inflorescence a leafy-bracteate spike. Flowers: hypanthium 1–3 mm long; sepals 1–2 mm long, reflexed; petals 1–2 mm long, white; stigma globose. Capsule sessile, linear, straight to contorted, 4-angled, glandular-puberulent, 8–25 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Wagner et al. (2007, Syst. Bot. Monogr. Vol. 83) treat this as Eremothera minor (A. Nelson) W.L. Wagner & Hoch.

Species Range
Montana Range Range Descriptions


Range Comments
WA to MT south to CA, NV, UT and CO. Known from Carbon 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: 23

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



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

Dry sandy or gravelly soil of juniper woodlands or plant associations dominated by Artemisia tridentata.
Predicted Suitable Habitat Model

This species has a Predicted Suitable Habitat Model available.

To learn how these Models were created see

  • 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
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    • Lesica, P. and P.L. Achuff. 1992. Distribution of vascular plant species of special concern and limited distribution in the Pryor Mountain desert, Carbon County, Montana. Unpublished report to the Bureau of Land Management. Montana Natural Heritage Program, Helena, MT. 105 pp.
    • Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
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Citation for data on this website:
Small-flowered Evening-primrose — Camissonia minor.  Montana Field Guide.  .  Retrieved on , from