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Montana Field Guide

Montana Field Guides

Tall Buttercup - Ranunculus acris

Noxious Weed: Priority 2A

Global Rank: G5
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
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
Unknown/Undetermined
 


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).

Observations in Montana Natural Heritage Program Database
Number of Observations: 488

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

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



Habitat
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).

Management

References
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Citation for data on this website:
Tall Buttercup — Ranunculus acris.  Montana Field Guide.  .  Retrieved on , from