tall buttercup

Ranunculus acris L.

Appearance: Ranunculus acris is a short lived perennial herbaceous plant. The plant is erect, hairy, grows from 10-40 in. (25.4-101.6 cm) tall and has fibrous roots. R. acris is native to temperate Asia and Europe.
Foliage: Foliage is divided and pilose with long petioles. Basal leaf blades of R. acris have 3-5 deep lobes that are also divided. The overall shape is pentagonal about 0.7-2.0 by 1.0-3.9 in. (1.8-5.2 by 2.7-9.8 cm). It has toothed margins.
Flowers: R. acris flowers have shiny yellow petals up to 1.25 in. (3.2 cm) wide. Flowers have sepals about half the size of the petals. Flowers bloom from May-Oct.
Fruit: R. acris reproduces by seeds. Fruits are globose achenes 2-4 in. (5-10 cm) wide.
Ecological Threat: R. acris can be found invading wet lowlands, rich woodlands, pastures, meadows, and along roadsides and other disturbed sites. It prefers heavy, moist soils but can grow in sandy or gravelly soil where there is sufficient moisture.

Plant(s) in flower
John Cardina, The Ohio State University, Bugwood.org
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Flower(s)
John Cardina, The Ohio State University, Bugwood.org
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Foliage
John Cardina, The Ohio State University, Bugwood.org
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Plant(s)
Montana Statewide Noxious Weed Awareness and Education Program , Montana State University, Bugwood.org
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Flower(s)
Montana Statewide Noxious Weed Awareness and Education Program , Montana State University, Bugwood.org
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