''Ranunculus longirostris'', the longbeak buttercup, is an aquatic plant in the

buttercup family Ranunculaceae (buttercup or crowfoot family; Latin "little frog", from "frog") is a family of over 2,000 known species of flowering plants in 43 genera, distributed worldwide. The largest genera are ''Ranunculus'' (600 species), ''Delphinium' ...

. This species is native to

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

and the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

, where it is widespread. However, it is absent from most of the Southeastern United States. It is found in a diversity of freshwater aquatic habitats, often in streams with slow moving water. There has been some difficulty in separating this species from the closely related '' Ranunculus trichophyllus'', due in part to the lack of preservation of critical features on herbarium specimens.University of Michigan Herbarium
/ref>

References

External links

longirostris Flora of Northern America {{Ranunculales-stub