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Montana Field Guide

Montana Field Guides

Soft-hairy False Gromwell - Onosmodium molle

Native Species

Global Rank: G4G5
State Rank: SNR

Agency Status


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General Description
Perennial from a woody, branched caudex. Stems ascending to erect, simple, 30–70 cm. Herbage densely hirsute, hispid. Leaves cauline, sessile, lanceolate, 3–8 cm long. Inflorescence branched, bracteate, terminal, helicoid cymes. Flowers: calyx hispid, deeply divided into unequal segments, 6–12 mm long; corolla villous, white with green lobes, tubular-funnelform, 12–14 mm long, lobes 2–3 mm long; fornices absent; anthers at the top of the tube; style exserted; anthers and style maturing before the corolla opens. Nutlets 1–4, ovate, smooth, 3–5 mm long; scar basal without a rim (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety occidentale (Mack.) I.M.Johnst.

Range Comments
AB to MB, NY south to TX, MO and VA (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 7

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Relative Density



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


The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus bifarius, Bombus centralis, Bombus flavifrons, Bombus mixtus, Bombus rufocinctus, Bombus sylvicola, Bombus occidentalis, and Bombus insularis (Macior 1974).

  • 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.
    • Macior, L.M. 1974. Pollination ecology of the Front Range of the Colorado Rocky Mountains. Melanderia 15: 1-59.
    • McGregor, R.L. (coordinator), T.M. Barkley, R.E. Brooks, and E.K. Schofield (eds). 1986. Flora of the Great Plains: Great Plains Flora Association. Lawrence, KS: Univ. Press Kansas. 1392 pp.
  • Additional ReferencesLegend:   View Online Publication
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    • 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.
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Citation for data on this website:
Soft-hairy False Gromwell — Onosmodium molle.  Montana Field Guide.  .  Retrieved on , from