Abstract
Marshallia grandiflora (Asteraceae, Helenieae, Marshalliinae) is recognized as the 53rd extinct species to North America, and an endemic species of the Blue Ridge physiographic province of North Carolina. A new name, Marshallia pulchra, is provided for the more broadly ranging species that has been confounded with and generally considered conspecific with M. grandiflora. Morphologic and biogeographic data clearly separates two species within the previous concept of M. grandiflora. Marshallia grandiflora and M. pulchra are compared with their sister species, M. legrandii. Cytological data is given for M. legrandii, including the first report of B-chromosomes in the genus.
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