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Montana Field Guides

Oeder's Lousewort - Pedicularis oederi

Potential Species of Concern
Native Species

Global Rank: G5
State Rank: S3S4

Agency Status
MNPS Threat Rank:

External Links

General Description
Stems 4–15 cm, mostly solitary. Leaves mainly basal, 3–10 cm long; blades deeply pinnately lobed into serrate, ovate segments 2–10 mm long. Inflorescence villous, densely flowered, 2–7 cm long; bracts leaf-like. Flowers: calyx 9–12 mm long, 5-lobed, the lobes 1–3 mm long; corolla yellow, 15–25 mm long; galea 7–10 mm long without a beak (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)..

Species Range

Range Comments
Circumpolar south to central BC, disjunct in Carbon and Stillwater counties and adjacent WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 11

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Relative Density



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


  • Additional ReferencesLegend:   View Online Publication
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    • Fertig, W. and M. Bynum. 1994. Biological report on the proposed Twin Lakes Research Natural Area. Unpublished report to the Shoshone National Forest. Wyoming Natural Diversity Database, Laramie, Wyoming. 33 pp. plus appendices.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Williams, K.L. 2012. Classification of the grasslands, shrublands, woodlands, forests and alpine vegetation associations of the Custer National Forest portion of the Beartooth Mountains in southcentral Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 376 p.
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Citation for data on this website:
Oeder's Lousewort — Pedicularis oederi.  Montana Field Guide.  .  Retrieved on , from