The true identity of Marshallia grandiflora, an extinct species, and the description of Marshallia pulchra (Asteraceae, Helenieae, Marshalliinae)

WESLEY M. KNAPP; DERICK B. POINDEXTER; ALAN S. WEAKLEY

doi:10.11646/phytotaxa.447.1.1

Issue: Vol. 447 No. 1: 4 June 2020

Type: Article

Published: 2020-06-04

DOI: 10.11646/phytotaxa.447.1.1

Page range: 1–15

Abstract views: 39

PDF downloaded: 44

**The true identity of Marshallia grandiflora, an extinct species, and the description of Marshallia pulchra (Asteraceae, Helenieae, Marshalliinae)**

WESLEY M. KNAPP⁺⁻
DERICK B. POINDEXTER⁺⁻
ALAN S. WEAKLEY⁺⁻

North Carolina Natural Heritage Program, 176 Riceville Rd., Asheville, NC 28805.

UNC Herbarium (NCU), Campus Box 3280, North Carolina Botanical Garden, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280.

Marshallia grandiflora Marshallia pulchra Marshallia legrandii endemic extinct Asteraceae conservation concern morphology cytology Eudicots

PDF (10MB)

Abstract

Marshallia grandiflora (Asteraceae, Helenieae, Marshalliinae) is recognized as the 53^rd 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.