Ranunculus rhomboideus Goldie
prairie buttercup (Labrador buttercup)
Ranunculaceae (Buttercup family)

Introduction to Vascular Plants

Photograph

© RĂ©al Sarrazin     (Photo ID #29028)


Map

E-Flora BC Static Map

Distribution of Ranunculus rhomboideus
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Species Information

General:
Perennial herb from fibrous roots; stems 1 to several, erect, 10-25 cm tall, usually long soft-hairy when young, becoming nearly smooth.
Leaves:
Basal leaves persistent, egg- to diamond-shaped, undivided, 1-5 cm long, 1-3.5 cm wide, shallowly round-toothed, tips rounded, bases wedge-shaped and entire, the stalks long; stem leaves unstalked or nearly so, fan-shaped and divided nearly to base into 3 to 5 linear to lanceolate segments.
Flowers:
Inflorescence a 3- to 12-flowered cyme; flower stalks long soft-hairy; receptacle long soft-hairy; petals 5, distinct, yellow, 6-8 mm long, 2-4 mm wide, egg-shaped, nectary on upper surface, the scale smooth; sepals 5, spreading to bent back, 4-6 mm long, 1.5-3 mm wide, long soft-hairy; stamens about 50; pistils 40-50.
Fruits:
Achenes, numerous in a nearly globe-shaped head 4-6 mm long, 5-7 mm wide, the achenes egg-shaped, 1.8-2.2 mm long, 1.2-1.8 mm wide, smooth; beaks slender, 0.2-0.3 mm long, curved.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Habitat and Range

Dry grasslands, thickets and open forests in the montane zone; rare in NE BC; N to NT, E to ON and S to MA, NB and IL.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Ranunculus ovalis Raf.