Comments on the status of Packera crawfordii (Asteraceae, Senecioneae), a neglected species of the southeastern United States

Abstract

In 1901 N. L. Britton described Senecio crawfordii, a wetland species of southeastern North America. Although accepted as a species during the first half of the twentieth century, the taxon was treated as a variety of the species now known as Packera paupercula, or Britton’s binomial was reduced to synonymy under that species. However, the taxon’s morphological and ecological distinctness argued for its reinstatement as a species. This work adds a second-step lectotypification and provides a detailed treatment not included in the brief validation and lectotypification of the new combination, P. crawfordii.