Sagittaria subulata
 Sagittaria subulata the seaside arrowhead is an aquatic plant species that grows primarily in shallow brackish water along the seacoast in marshes estuaries etc. It is native to the Republic of Colombia the District of Columbia Venezuela and every US state along the coast from Massachusetts to Louisiana. It is also naturalized in Great Britain the Azores and on the Island of Java in Indonesia.Sagittaria subulata is a perennial herb up to 40 cm tall.