Three New Varieties of Packera paupercula (Asteraceae, Senecioneae) in Midwestern and Southeastern North America

• Alison McKenzie Mahoney ^[1] ; Robert R. Kowal ^[2]
  1. [1] Minnesota State University, Mankato

     Minnesota State University, Mankato

     City of Mankato, Estados Unidos

     
  2. [2] University of Wisconsin–Madison

     University of Wisconsin–Madison

     City of Madison, Estados Unidos

     
• Localización: Novon: a journal for botanical nomenclature, ISSN 1055-3177, Vol. 18, Nº. 2, 2008, págs. 220-228
• Idioma: inglés
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• Resumen

  • We describe two new varieties of the North American species complex Packera paupercula (Michaux) Á. Löve & D. Löve (Asteraceae, Senecioneae): variety savannarum R. R. Kowal from the American upper Midwest and variety appalachiana A. M. Mahoney from the southeastern United States. The new combination P. paupercula var. pseudotomentosa (Mackenzie & Bush) R. R. Kowal from the Midwest is also established. Because of their pubescence, these varieties have been previously included within a broadly circumscribed P. plattensis (Nuttall) W. A. Weber & Á. Löve. Their recognition is based on a biosystematic study, which included morphological and ecological observations in the field and in a transplant garden experiment, and chromosome counts.