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Montana Field Guide

Montana Field Guides

Tall Buttercup - Ranunculus acris

Noxious Weed: Priority 2A
Exotic Species (not native to Montana)

Global Rank: G5
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 0

External Links

General Description
Stems 25–80 cm, erect with hirsute foliage. Basal leaf blades pentagonal, 3–6 cm long, ternate, the sessile leaflets deeply lobed into oblong, dentate segments. Flowers numerous in a diffuse inflorescence; petals 8–10 mm, twice as long as the hirsute sepals. Achenes glabrous, 2–3 mm long with a curved beak 0.5 mm long; head globose, 6–9 mm high (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
Introduced AK to NL. south to CA, AZ, TN, GA; South America, Eurasia, and Australia (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 356

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Relative Density



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

Moist meadows, especially irrigated hay fields, and along roads, less abundant in wildland habitats; valleys, occasionally higher (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Literature Cited AboveLegend:   View Online Publication
    • McGregor, R.L., coordinator, and T.M. Barkley, R.E. Brooks, and E.K. Schofield, eds.: Great Plains Flora Association. 1986. Flora of the Great Plains. Lawrence, KS: Univ. Press Kansas. 1392 pp.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • 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:
Tall Buttercup — Ranunculus acris.  Montana Field Guide.  .  Retrieved on , from