A New Varietal Combination for a Narrowly Endemic Rock Daisy (Laphamia: Asteraceae) in Southern New Mexico

  • Zachary S. Rogers New Mexico State University
  • Richard W. Spellenberg New Mexico State University
Keywords: Chasmophile, Compositae, endemic, Laphamia, limestone, Perityle, rare plant, taxonomy, variety


The recent restructuring of Perityle Benth. (Asteraceae), s.l., warrants a new varietal combination of a narrowly endemic taxon in south-central New Mexico. The previously recognized P. staurophylla (Barneby) Shinners var. homoflora Todsen becomes Laphamia staurophylla Barneby var. homoflora (Todsen) Z. S. Rogers & Spellenb. A brief history of this taxon, a rationale for its recognition, and its status as a rare plant for the state are discussed.