''Salvinia oblongifolia'' is a species of plant in the

Salviniaceae Salviniaceae (), is a family of heterosporous ferns in the order Salviniales. The Salviniaceae contain the two genera '' Azolla'' and ''Salvinia ''Salvinia'' or watermosses is a genus of free-floating aquatic ferns in the family Salviniace ...

. Its leaves can grow with up to 6 cm long and 2.5 cm wide, making it the largest species in the genus ''

Salvinia ''Salvinia'' or watermosses is a genus of free-floating aquatic ferns in the family Salviniaceae. The genus is named in honor of 17th-century Italian naturalist Anton Maria Salvini, and the generic name was first published in 1754 by French bo ...

''''.'' Leaves are rectangular and approximately three times as long as wide with short blunt papillae that are arranged in double rows on the upper leaf surface, which make for easy identification.Riefner, Richard E., and Alan R. Smith. “SALVINIA MINIMA AND S. OBLONGIFOLIA (SALVINIACEAE) NEW TO CALIFORNIA, WITH NOTES ON THE S. AURICULATA COMPLEX.” ''Journal of the Botanical Research Institute of Texas'', vol. 3, no. 2, 2009, pp. 855–866. ''JSTOR'', www.jstor.org/stable/41971877. Accessed 12 Mar. 2021. This species is

native Native may refer to: People * '' Jus sanguinis'', nationality by blood * '' Jus soli'', nationality by location of birth * Indigenous peoples, peoples with a set of specific rights based on their historical ties to a particular territory ** Nat ...

to Eastern

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

, where it can be found growing on shallow, stagnant water bodies, where it can form dense, nearly pure colonies in lagoon habitats. Introduced populations have been found in the state of

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

in the United States.

References

Salviniales Flora of Brazil Plants described in 1834 {{Polypodiidae-stub