Typification of seabeach amaranth, Amaranthus pumilus (Amaranthaceae)

Amaranthus pumilus is known from coastal Massachusetts to South Carolina and from ballast in Philadelphia, Pennsylvania. It is currently listed by the United States Fish and Wildlife Service as a threatened species.Amaranthus pumilus was originally described by Rafinesque in 1808 from southern New Jersey, but he did not cite specimens. Here, the nameA. pumilus is lectotypified using the only known original element, a Rafinesque specimen at the herbarium of The Academy of Natural Sciences, Philadelphia (PH).