Packera insulae-regalis (Asteraceae, Senecioneae), a new species endemic to Isle Royale, Michigan, U.S.A

Packera insulae-regalis (Asteraceae, Senecioneae) is a new species that is only known from one population occurring near the summit of Mount Franklin on Isle Royale, Michigan, U.S.A. It resembles both P. paupercula and P. indecora but is hexaploid, whereas the former has diploid and tetraploid popul...

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Bibliographic Details
Published inBrittonia Vol. 63; no. 3; pp. 343 - 354
Main Authors Kowal, Robert R., Judziewicz, Emmet J., Edwards, Joan
Format Journal Article
LanguageEnglish
Published New York New York Botanical Garden and Springer 01.09.2011
Springer-Verlag
Subjects
Achenes
Biomedical and Life Sciences
Diploidy
Flowering
Hexaploidy
Inflorescences
Life Sciences
National parks
Plant Anatomy/Development
Plant Ecology
Plant Physiology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Plants
Species
Taxa
Taxonomy
Tetraploidy
Isle Royale
Senecioneae
hexaploid
endemic
Asteraceae
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Summary:Packera insulae-regalis (Asteraceae, Senecioneae) is a new species that is only known from one population occurring near the summit of Mount Franklin on Isle Royale, Michigan, U.S.A. It resembles both P. paupercula and P. indecora but is hexaploid, whereas the former has diploid and tetraploid populations and the latter is octoploid around the western Great Lakes. Whereas most species of Packera are self-incompatible (as is P. paupercula) and a few are self-compatible (as is P. indecora), P. insulae-regalis is unique in the genus in being partially self-compatible, as far as is known. Its origin postglacially by hybridization between these two species is hypothesized.
ISSN:0007-196X
1938-436X
DOI:10.1007/s12228-010-9177-6