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Ranunculus rhomboideus

Ranunculus rhomboideus Goldie

Labrador Buttercup, Prairie Buttercup

Ranunculaceae (Buttercup Family)

Synonym(s): Ranunculus ovalis

USDA Symbol: RARH

USDA Native Status: L48 (N), CAN (N)

Usually less than 1 ft. tall, the branched flowering stalk of this perennial bears three- to five-cleft leaves above a basal cluster of broader, undivided foliage. Glossy yellow, five-petaled flowers occur singly on slender stalks from the axils of upper leaves. Petals are often tinged with lavender underneath.

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Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Achene
Size Notes: Up to about 10 inches tall.

Bloom Information

Bloom Color: Yellow
Bloom Time: Apr , May , Jun

Distribution

USA: IA , IL , MA , MI , MN , MT , ND , NE , RI , SD , WI
Canada: SK
Native Distribution: Ont. to B.C., s. to s. MI, n. IL & NE
Native Habitat: Grasslands; rock outcrops; open woods

Growing Conditions

Light Requirement: Part Shade
Soil Description: Sandy or gravelly soils.
Conditions Comments: Colonies of this hardy buttercup have been known to persist in quack sod. Effective in rock gardens and borders.

Propagation

Description: Fresh seed planted in June emerges in August and flowers the following spring. Seeds have low germination. Division of mature plants provides another means of increase.
Seed Collection: Collect in late May and Jun.
Seed Treatment: None required.
Commercially Avail: yes

Find Seed or Plants

Find seed sources for this species at the Native Seed Network.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Native Seed Network - Corvallis, OR

Bibliography

Bibref 1294 - The Midwestern Native Garden: Native Alternatives to Nonnative Flowers and Plants An Illustrated Guide (2011) Adelman, Charlotte and Schwartz, Bernard L.

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Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 26 - Minnesota Wildflowers: a field guide to the flora of Minnesota (2009)
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Ranunculus rhomboideus in USDA Plants
FNA: Find Ranunculus rhomboideus in the Flora of North America (if available)
Google: Search Google for Ranunculus rhomboideus

Metadata

Record Modified: 2023-02-24
Research By: TWC Staff

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