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Montana Field Guide

Montana Field Guides

Nineleaf Biscuitroot - Lomatium triternatum

Native Species

Global Rank: G5
State Rank: S5

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

General Description
Plants subacaulescent from a slender taproot and usually simple crown. Herbage: puberulent. Leaf blades obovate in outline, 4–20 cm long, triternate or tripinnate; ultimate segments well-separated, linear (rarely oblong), 1–12 cm long. Umbels: peduncles ascending, 2–40 cm; rays unequal, 1–7 cm long; involucel bracts few, linear, 2–4 mm long. Flowers yellow Mericarps lanceolate to narrowly elliptic, 7–15 mm long, glabrous; marginal wings 1–1.5 mm wide; oil tubes solitary in the intervals (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Montana plants are varieties triternatum, anomalum (M.E. Jones ex. J.M. Coult. & Rose) Mathias, and platycarpum (Torr.) B. Boivin.

Species Range
Montana Range


Range Comments
BC, AB south to CA and CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 1000

(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)

Grasslands, sagebrush steppe, meadows, open forest, pine woodlands; valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
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    • Cope, M.G. 1992. Distribution, habitat selection and survival of transplanted Columbian Sharp-tailed Grouse (Tympanuchus phasianellus columbianus) in the Tobacco Valley, Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 60 p.
    • Johnson, T. W. 1982. An analysis of pack and saddle stock grazing areas in the Bob Marshall Wilderness. M.Sc.Thesis. Bozeman, MT: Montana State University. 105 p.
    • 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.
    • Wiman, N.G. 2001. Dynamics of leafy spurge (Euphorbia esula L.) infested plant communities influenced by flea beetles in the Aphthona complex (Colepotera: Chrysomelidae). M.Sc. Thesis. Bozeman, MT: Montana State University. 148 p.
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Citation for data on this website:
Nineleaf Biscuitroot — Lomatium triternatum.  Montana Field Guide.  .  Retrieved on , from