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1 April 2011 A New Species of Polymnia (Asteraceae: Tribe Polymnieae) from Tennessee
Dwayne Estes, James Beck
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Polymnia johnbeckii, a new, narrowly endemic species, is distinct in its combination of highly dissected leaves, hirsute herbage, and relatively large, showy heads. It is known from two populations in Marion County, Tennessee, and should be considered a rare species at both the state and federal level. A chromosome count indicates that P. johnbeckii is diploid. Although standard cladogenesis is the null hypothesis for the origin of this diploid species, evidence supporting an alternative scenario of homoploid hybrid speciation is discussed.

© Copyright 2011 by the American Society of Plant Taxonomists
Dwayne Estes and James Beck "A New Species of Polymnia (Asteraceae: Tribe Polymnieae) from Tennessee," Systematic Botany 36(2), 481-486, (1 April 2011).
Published: 1 April 2011
Cumberland Plateau
endangered species
Polymnia johnbeckii
Sequatchie Valley
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