''Sparganium acaule'' is a perennial plant found in the
United States of America
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 states and a federal capital district, Washington, D.C. The 48 contiguo ...
and
Canada
Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
.
[Cook and Nicholls (1986) A monographic study of the genus ''Sparganium''. Part 1: Subgenus Xanthosparganium. Botanica Helvetica 96: 213-267.][Ito, Y., Nr. Tanaka, C.-K. Kim, R. Kaul, D. C. Albach (2016) Phylogeny of ''Sparganium'' (Typhaceae) revisited: Non-monophyletic nature of S. emersum sensu lato and resurrection of S. acaule. Plant Systematics and Evolution 302(1): 129-135.] This taxon was included within ''Sparganium emersum'' by Cook and Nicholls (1986)
[ but was recently resurrected as a distinct species.][
]
References
{{Taxonbar, from=Q22286433
acaule