Rediscovery of marsilea vestita subsp. vestita in Pulaski County, Arkansas After 162 Years

摘要

We report the first vouchered record of Marsilea vestita Hook. and Grev. subsp. vestita from Pulsaki County Arkansas in 162 years. Two patches of the hairy water fern, M. vestita subsp. vestita were discovered by W. Shepherd on 20 September 1997 at the edge of a backwater pond along the Arkansas River at Murray Park in Little Rock. Prior to this record, the most recent collection of this species form Pulaski County was taken form "the margin of small swamps In the deep bottom woods on the Arkansas River, not far Below Little Rock" in July of 1835 by the German botanist and physician George Engelmann.