Comments on the status of Packera crawfordii (Asteraceae, Senecioneae), a neglected species of the southeastern United States
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- 作者：Robert R. Kowal ; Alison McKenzie Mahoney
- 刊名：Brittonia
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：68
- 期：1
- 页码：74-82
- 全文大小：1,068 KB
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——— & R. R. Kowal. 2008. Three new varieties of Packera paupercula (Asteraceae, Senecioneae) in midwestern and southeastern North America. Novon 18: 220–228.
———, V. W. Kong, & R. R. Kowal. 2002. Documented chromosome numbers 2002: 3. Chromosome counts for Packera paupercula var. appalachiana (Asteraceae: Senecioneae). Sida 20: 605–610.
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Trock, D. K. 2006. Packera. In: Flora of North America Editorial Committee (eds.), Flora of North America north of Mexico, 20: 570–602. Oxford University Press, New York. - 作者单位：Robert R. Kowal (1)
Alison McKenzie Mahoney (2)
1. Department of Botany, Birge Hall, University of Wisconsin, 430 Lincoln Drive, Madison, WI, 53706, U.S.A.
2. Department of Biological Sciences, Minnesota State University-Mankato, Mankato, MN, 56001, U.S.A. - 刊物主题：Plant Sciences; Plant Systematics/Taxonomy/Biogeography; Plant Anatomy/Development; Plant Physiology; Plant Ecology;
- 出版者：Springer US
- ISSN：1938-436X
文摘
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.