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Rock buttercup

Ranunculus micranthus Nutt.

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Rock buttercup leaf
Rock buttercup stem
Rock buttercup
Rock buttercup
Rock buttercup

Morphology

Stem
Erect, lower portion soft-hairy.
Leaves
Basal leaves persistent, circular or mostly egg-shaped in outline, .4 to 1.2 inch long and wide, sparsely soft-hairy; some blades deeply 3-5-lobed; margins scalloped; bases cut straight across to broadly rounded; tips rounded-blunt; stem leaves deeply divided, sessile to nearly sessile, often 3-5-cleft; segments varying; upper stem leaves reduced to bracts above.
Inflorescence
Flowers borne singly on terminal and axillary stalks; 8-35-flowered.
Flower
Stalks glabrous or soft-hairy; sepals 5, 1/12 to 1/6 inch long, greenish-yellow, back side glabrous or pubescent; petals 5, inconspicuous, shorter than sepals, yellow, fading white.
Fruit
Achenes, 10-40, tiny, glabrous, dull, in spherical to cylindrical heads.

Ecology

Habitat
Open or rocky woods, shaded bluff ledges, meadows, clearings; moist or dry rocky or alluvial soils.
Distribution
Easternmost tier of counties in Kansas

Additional Notes

Comments

Similar to early wood buttercup, Ranunculus abortivus, but leaves, sepals, and fruiting heads smaller.

Quick Facts
Plant Type
Wildflower
Family
Ranunculaceae - Buttercup Family
Life Span
Perennial
Height
4.4 to 16 inches tall
Last Updated
2010-03-17
Color Groups
Yellow Wildflowers
Flowering Period
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Blooms: April, May