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Blastocaulon (Eriocaulaceae), a synonym of Paepalanthus: Morphological and molecular evidence

Maria José Gomes de Andrade, Ana Maria Giulietti, Raymond Mervyn Harley and Cássio van den Berg
Taxon
Vol. 60, No. 1 (February 2011), pp. 178-184
Stable URL: http://www.jstor.org/stable/41059831
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Blastocaulon (Eriocaulaceae), a synonym of Paepalanthus: Morphological and molecular evidence
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Abstract

Generic circumscription in Eriocaulaceae has been based primarily on one to few floral characters and phylogenetic relationships within the family have only recently been explored in detail. Here, we present a morphological and phylogenetic study of Blastocaulon and Paepalanthus ser. Leptocephali, based on individual and combined datasets of the psbA-trnH plastid region and nuclear ITS. All results rejected the monophyly of Blastocaulon. Based on results and previous analyses, we propose the synonymization of Blastocaulon under Paepalanthus, the only morphological distinction between the two genera being the number of pollen-sacs. Reduction of pollen-sac number has occurred more than once in the evolution of Eriocaulaceae.

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