Ranunculus recurvatus (Hooked Buttercup)

Plant Info
Also known as: Blisterwort, Hooked Crowfoot
Genus:Ranunculus
Family:Ranunculaceae (Buttercup)
Life cycle:perennial
Origin:native
Habitat:part shade; average to moist woods, along streams, edges of swamps, floodplains
Bloom season:May - June
Plant height:1 to 2 feet
Wetland Indicator Status:GP: FACW MW: FACW NCNE: FACW
MN county distribution (click map to enlarge):Minnesota county distribution map
National distribution (click map to enlarge):National distribution map

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Detailed Information

Flower: Flower shape: 5-petals

[photo of flowers] Flowers are at the end of stalks that arise from the upper leaf axils. Flowers are ¼ to ½ inch across, 5 narrowly triangular to oblong, pale yellow petals and about 20 yellow-tipped stamens surrounding a bright green center. The 5 yellowish-green sepals are about as long as the petals, or a little longer, and typically bend back away from the flower (reflexed).

Leaves and stem: Leaf attachment: alternate Leaf attachment: basal Leaf type: lobed

[photo of leaves] Leaves are basal and alternate, up to 4 inches long and 3 inches wide, lobed or deeply divided into 3 or 5 parts, with long leaf stalks that become shorter as leaves ascend the stem. The lobes are coarsely toothed toward the tip end and may be further divided with more shallow lobes. Stems and leaf stalks are both hairy, and the leaves may also have scattered hairs on the surfaces, and fine hairs along the edges. Stems are erect, branched, and do not root at the nodes.

Fruit: Fruit type: seed without plume

[photo of fruit] The flower center expands into a round seed head about ¼ inch in diameter. Seeds are smooth with a hook at the tip of the beak, which is where the common name originates.

Notes:

The flowers of Hooked Buttercup are unique enough to distinguish it from other Ranunculus species with small yellow flowers. There are two varieties but one is limited to tropical climates, leaving var. recurvatus inhabiting Minnesota and much of the eastern half of North America

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More photos

Photos by K. Chayka taken at Wild River State Park, Chisago County, and in Ramsey County.

Comments

Have you seen this plant in Minnesota, or have any other comments about it?

Posted by: Steve - Eagan, Mn
on: 2011-05-24 17:34:12

Found this plant growing in my wooded back yard in Eagan, Mn. It is slightly common. Have been waiting for 3 weeks for it to bloom so I could identify it. Nice foliage which will provide added green in the summer months as I remove the buckthorn and boxelder shoots.

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