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Montana Field Guide

Montana Field Guides

Common Flax - Linum usitatissimum
Other Names:  Linseed

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 1

External Links

General Description
Annual. Stems 20–80 cm, mostly unbranched. Leaves linear-lanceolate, 1–3 cm long. Flowers blue (white); sepals ovate, 6–8 mm long, the inner ciliate; petals 10–15 mm long; styles distinct. Capsule 6–8 mm long, splitting into 10 1-seeded segments (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced from Europe, cultivated for fiber and oil; sporadic in western North America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 5

(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)



  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Buchanan, R. 1987. A Weavers Garden. Loveland: Interweave Press.
    • Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Common Flax — Linum usitatissimum.  Montana Field Guide.  .  Retrieved on , from