Data from: An expanded plastid phylogeny of Marsilea with emphasis on North American species

W. Mark Whitten, Colette C. Jacono & Nathalie S. Nagalingum
Ferns of the genus Marsilea (water clover) are potentially invasive aquatic and wetland plants. They are difficult to identify to species because of subtle diagnostic characters, the sterile condition of many specimens, and unresolved taxonomic problems. We sequenced four plastid regions (rbcL, rps4, rps4-trnS spacer, and trnL-F spacer) from 223 accessions across ca. 38 species. Our goals were to: 1) attempt to identify problematic Marsilea specimens from the southeastern U.S., and 2) assess species delimitation...
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