''Sagittaria guayanensis'', the Guyanese arrowhead, is an aquatic plant species. It is predominantly tropical, native to Mexico, Central America, the

West Indies The West Indies is a subregion of North America, surrounded by the North Atlantic Ocean and the Caribbean Sea that includes 13 independent island countries and 18 dependencies and other territories in three major archipelagos: the Greate ...

, and much of South America, as well as West Africa (from

Senegal Senegal,; Wolof: ''Senegaal''; Pulaar: 𞤅𞤫𞤲𞤫𞤺𞤢𞥄𞤤𞤭 (Senegaali); Arabic: السنغال ''As-Sinighal'') officially the Republic of Senegal,; Wolof: ''Réewum Senegaal''; Pulaar : 𞤈𞤫𞤲𞤣𞤢𞥄𞤲𞤣𞤭 ...

Cameroon Cameroon (; french: Cameroun, ff, Kamerun), officially the Republic of Cameroon (french: République du Cameroun, links=no), is a country in west-central Africa. It is bordered by Nigeria to the west and north; Chad to the northeast; the C ...

), south and southeast Asia (from Afghanistan to

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the nort ...

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

), plus Sudan and

Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...

. It was unknown in the United States until a few populations were reported from

Louisiana Louisiana , group=pronunciation (French: ''La Louisiane'') is a state in the Deep South and South Central regions of the United States. It is the 20th-smallest by area and the 25th most populous of the 50 U.S. states. Louisiana is borde ...

in 1969. The epithet has incorrectly been spelled "''guyanensis''" by some authors. Type locale is not Guyana but rather in the Guayana region in what is now eastern

Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th ...

, regarded as part of Colombia when the specimen was collected. ''Sagittaria guayanensis'' is a perennial herb with broadly hastate (arrow-shaped) leaves with ovate lobes.

References

External links

photo of herbarium specimen at Missouri Botanical Garden, ''Sagittaria guayanensis'' collected in NicaraguaFlora of Pakistan ''Sagittaria guayanensis''
* ttp://www.westafricanplants.senckenberg.de/root/index.php?page_id=14&id=1378 West African Plants, a photo guide, ''Sagittaria guayanensis'' br>Plantes des Rizieres de Guyane, Cirad, ''Sagittaria guayanensis''
{{Taxonbar, from=Q15601363 guayanensis Flora of Mexico Flora of South America Flora of West Tropical Africa Flora of Sudan Flora of Madagascar Flora of China Flora of Afghanistan Flora of tropical Asia Plants described in 1816