bur buttercup, hornseed buttercup, curveseed butterwort
1 species
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Ceratocephala testiculatahornseed buttercup
Distribution: Introduced in all of western United States, and east in the northern half of the United States to Ohio; chiefly east of the Cascades in Washington and Oregon
Habitat: Disturbed soil in sagebrush deserts and plains
Origin: Introduced from Europe
Flowers: March-May