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Genus = Ranunculus,

Displaying matches 1 - 26 of 26.
Ranunculus acris   (tall buttercup, meadow buttercup)  
(= Ranunculus acris in Flora of the Pacific Northwest)
Perennial from slender, fibrous roots with stiff, spreading hairs throughout, the 1-several stems freely branched, hollow, erect, 3-8 dm. tall.
Distribution: Found in much of the United States, but introduced in the Pacific Northwest, where more common west of the Cascades
Habitat: Moist to well-drained soil at low to moderate elevations

Ranunculus alismifolius   (plantain-leaf buttercup, dwarf plantain-leaved buttercup)  
(= Ranunculus alismaefolius in Flora of the Pacific Northwest)
Usually glabrous perennial from a cluster of fibrous roots, the 1-several stems erect, 1.5-6 dm. tall.
Distribution: Throughout much of western United States and southwest Canada
Habitat: Swales, streambanks and moist meadows, moderate to high elevations in the mountains

Ranunculus aquatilis   (white water buttercup, white water crowfoot)  
(= Ranunculus aquatilis var. hispidulus in Flora of the Pacific Northwest)
Pubescent, aquatic perennial, the stem flaccid, rooting at the nodes, 1-2 mm. thick and up to 1 m. long.
Distribution: Alaska to California, east to Montana and Wyoming
Habitat: In sluggish streams and ponds, low to moderate elevations

Ranunculus arvensis   (corn buttercup, field buttercup, hungerweed)  
(= Ranunculus arvensis in Flora of the Pacific Northwest)
Stiff-hairy annual from thick fibrous roots, the stem single, sometimes rooting at the lower nodes, 1.5-4 dm. tall.
Distribution: Widely introduced in North America; chiefly in eastern Washington, Oregon and California in our region.
Habitat: Dry woodlands and waste ground.

Ranunculus californicus   
Appressed-hairy perennial from slender, fibrous roots, the several stems freely branched, 2-6 dm. tall, spreading but not rooting at the nodes.
Distribution: Along the coast from Clatsop County, Oregon, to California.
Habitat: Grassy bluffs

Ranunculus cooleyae   (Cooley's buttercup)  
Scapose perennial from a thick, fibrous root, glabrous throughout.
Distribution: Alaska and the Cascades of British Columbia, known in Washington from Mt. Colonel Bob in the Olympics and Del Campo Peak Snohomish county.
Habitat: Damp slopes and rocky crevices at high elevations, blossoming as snow recedes.

Ranunculus cymbalaria   (alkali buttercup, seaside buttercup)  
(= Ranunculus cymbalaria in Flora of the Pacific Northwest)
Usually glabrous perennial from slender, fibrous roots, the stems several, one or more of them stolonous and freely-rooting, 1-4 dm. long, the others scapose, 5-30 cm. tall.
Distribution: Thjroughout much of North and South America, and Eurasia.
Habitat: Ditches, marshes and muddy meadowlands.

Ranunculus eschscholtzii   (Eschscholtz's buttercup)  
(= Ranunculus eschscholtzii in Flora of the Pacific Northwest)
Mostly glabrous, often glaucous perennial from slender, fibrous roots, the 1-several scapose stems erect, 10-20 cm. tall.
Distribution: Alaska to California, east to Montana, Colorado and New Mexico
Habitat: Meadow and talus slopes at mid- to high elevations in the mountains

Ranunculus ficaria   (fig buttercup, lesser celandine)  
(= Ranunculus ficaria in Flora of the Pacific Northwest)
Glabrous, herbaceous perennials from tuberous roots, the stems decumbent or erect, not rooting nodally; bulbils sometimes formed in leaf axils.
Distribution: In scattered locations in western Washington but likely more widespread; British Columbia south to Oregon; eastern North America.
Habitat: Disturbed areas often where shaded and moist.

Ranunculus flabellaris   (yellow water buttercup)  
(= Ranunculus flabellaris in Flora of the Pacific Northwest)
Usually glabrous perennial, the stems hollow, freely branching, floating, or creeping on mud flats and rooting at the nodes.
Distribution: East side of the Cascades, British Columbia to northern California, east in Canada to Quebec.
Habitat: Shallow ponds, mud flats and marshes at low elevations.

Ranunculus flammula   (greater creeping spearwort)  
(= Ranunculus flammula in Flora of the Pacific Northwest)
Low perennial from slender roots, the stem nearly prostrate, simple or sparingly branched, rooting at the nodes, up to 5 dm. long.
Distribution: Alaska south through Washington to California, east to the Rocky Mountain States and through Canada to the Atlantic Coast; also in Europe.
Habitat: Mostly in mud, often where brackish, from sea level to mid-elevations in the mountains.

Ranunculus gelidus   (modest buttercup, arctic buttercup)  
Perennial with slender, fibrous roots; stems several, slender, ascending to erect, not nodally rooting, 1- or 2-flowered, scape-like, 3-9 cm. tall.
Distribution: Olympic and Cascade mountains in Washington; scattered from Alaska south to Colorado in the Rocky Mountains.
Habitat: Alpine.

Ranunculus glaberrimus   (sagebrush buttercup)  
(= Ranunculus glaberrimus in Flora of the Pacific Northwest)
Perennial from a large cluster of fleshy roots, the several stems mostly erect, 5-20 cm. long, nearly glabrous, simple or branched above.
Distribution: East side of the Cascades, British Columbia to northern California, east to the Dakotas
Habitat: Sagebrush desert, shrub-steppe and ponderosa pine woodlands

Ranunculus gmelinii   (Gmelin's buttercup, small yellow water buttercup)  
(= Ranunculus gmelinii vars. hookeri, limosus in Flora of the Pacific Northwest)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska south to Nevada, east to the Rocky Mountains, and across Canada to the Atlantic Coast.
Habitat: Standing water up to 2 meters deep.

Ranunculus hebecarpus   (delicate buttercup, downy buttercup)  
(= Ranunculus hebecarpus in Flora of the Pacific Northwest)
Delicate annual with soft, fine hairs and filiform roots, the stems moderately branched, erect, 1-2.5 dm. tall.
Distribution: Eastern Washington and adjacent Idaho, south to Arizona and Baja California.
Habitat: Moist to rather dry hillsides and woodlands.

Ranunculus macounii   (Macoun's buttercup)  
(= Ranunculus macounii vars. macounii, oreganus in Flora of the Pacific Northwest)

Ranunculus muricatus   (spiny-fruit buttercup)  
(= Ranunculus muricatus in Flora of the Pacific Northwest)
Mostly glabrous annual from stout, fibrous roots, the 1-several stems simple below and forked above, 1-4.5 dm. tall, often hollow.
Distribution: Introduced in scattered locations in the United States; mostly west of the Cascades in Washington, Oregon and California.
Habitat: Ditches and other moist places, often on cultivated land.

Ranunculus occidentalis   (western buttercup)  
(= Ranunculus occidentalis in Flora of the Pacific Northwest)
Stiff-hairy perennial from slender fibrous roots, the 1-several stems erect, usually hollow, freely branched, 1.5-4 dm. tall.
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to California, east to Alberta and Nevada.
Habitat: Moist to well-drained soil, low to mid-elevations in the mountains.

Ranunculus orthorhynchus   (straight-beak buttercup)  
(= Ranunculus orthothynchus in Flora of the Pacific Northwest)
Stiff-hairy perennial from thickened roots, the several stems branched, erect to decumbent, 2-6 dm. tall.
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Montana and Utah.
Habitat: Streambanks and moist fields to mountain meadows and slopes.

Ranunculus parviflorus   (small-flower buttercup)  
(taxon is not treated in Flora of the Pacific Northwest)
Distribution: Sparingly introduced to lowlands of western Washington; Washington south to California; southeastern U.S.
Habitat: Roadsides, fields, urbanized settings, and other disturbed areas.

Ranunculus populago   (mountain buttercup, popular buttercup)  
(= Ranunculus populago in Flora of the Pacific Northwest)
Tender, glabrous perennial from clustered, fleshy roots, the 1-several stems erect, 1-3 dm. tall.
Distribution: In Washington and Oregon in the Blue and Wallowa Mountains, east into Idaho and Montana, and in the Cascades in Oregon south into California
Habitat: Wet areas at mid- to high elevations in the mountains

Ranunculus repens   (creeping buttercup)  
(= Ranunculus repens vars. pleniflorus, repens in Flora of the Pacific Northwest)
Stiff-hairy perennial from fibrous roots, the several stems decumbent, rooting at the nodes, up to 10 dm. long.
Distribution: Occurring throughout Washington, but most common west of the Cascades; Alaska south to California and Utah, and from central plains of U.S. to Labrador.
Habitat: Moist areas, lawns and gardens, disturbed forest understory.

Ranunculus sceleratus   (cursed buttercup, celery-leaved buttercup)  
(= Ranunculus sceleratus in Flora of the Pacific Northwest)
Usually glabrous annual from slender, fleshy roots, the 1-several stems erect, 2-5 dm. tall, freely branched, hollow.
Distribution: Widely distributed throughout much of Washington; widely distributed throughout much of North America.
Habitat: Moist meadows and boggy shoreland to semi-aquatic and often brackish areas.

Ranunculus testiculatus   (hornseed buttercup)  
Small, scapose annual, finely white-woolly throughout. Achene with 2 bulges on the base, then narrowed to a straight beak 3-4 mm. long.
Distribution: Introduced throughout the Pacific Northwest, especially in sagebrush.
Habitat: Dry or moist disturbed soil.

Ranunculus triternatus   (obscure buttercup)  
(= Ranunculus reconditus in Flora of the Pacific Northwest)
Perennial from a large cluster of fleshy roots, the several stems mostly erect, 5-20 cm. long, nearly glabrous, simple or branched above.
Distribution: Goldendale area, Klickitat County, Washington, south to Wasco County, Oregon.
Habitat: Sagebrush slopes.

Ranunculus uncinatus   (woodland buttercup, little buttercup)  
(= Ranunculus uncinatus in Flora of the Pacific Northwest)
Sub-glabrous to stiff-hairy annual or perennial from coarse, fibrous roots, the single, simple, erect, hollow stem 2-6 dm. tall.
Distribution: Widely distributed throughout Washington; Alaska to California, east to Montana and New Mexico.
Habitat: Moist, usually shady areas, sea level to mid-elevations in the mountains.



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