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Montana Field Guide

Montana Field Guides

Flaxleaf Plainsmustard - Schoenocrambe linifolia
Other Names:  Salmon River Plains-mustard, Sisymbrium linifolium, Hesperidanthus linearifolius, Thelypodiopsis linearifolia

Native Species

Global Rank: G5
State Rank: SNR

Agency Status


External Links

General Description
Glabrous, rhizomatous perennial. Stems erect, branched, 20–70 cm from a branched caudex. Leaves all cauline, sessile, linear, 25–60 mm long, entire, inrolled. Inflorescence an ebracteate raceme. Flowers yellow; petals 6–10 mm long. Fruits linear siliques, 2–6 cm long; style up to 1 mm long; seeds in 1 row per locule; pedicels ascending, 4–6 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
BC to OR, MT, WY to NV, UT and NM. East of the Cascades.

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)


  • 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.
    • 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.
    • Sater, S. 2022. The insects of Sevenmile Creek, a pictorial guide to their diversity and ecology. Undergraduate Thesis. Helena, MT: Carroll College. 242 p.
  • Web Search Engines for Articles on "Flaxleaf Plainsmustard"
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Citation for data on this website:
Flaxleaf Plainsmustard — Schoenocrambe linifolia.  Montana Field Guide.  .  Retrieved on , from