Sagittaria subulata, the awl-leaf arrowhead, narrow-leaved arrowhead or dwarf sagittaria, is an aquatic plant species that grows primarily in shallow brackish water along the seacoast, in marshes, estuaries, etc. It is native to the Colombia, Venezuela, and every US state along the coast from Massachusetts to Louisiana.Biota of North America Program map, Sagittaria subulata It has also been reported as naturalized in Great Britain on just three occasions; only one of these is recent and it appears to have become extinct by 2010. It is also recorded as a non-native on the Azores, and on the Island of Java in Indonesia.Kew World Checklist of Selected Plant Families, Sagittaria subulata
