Published online by Cambridge University Press: 14 July 2015
Plant fossils from the Tertiary strata of the Great Plains are relatively common and have been reported for over 100 years (Stansbury, 1852; Elias, 1942; Thomasson, 1979, 1985, 1991; Gabel, 1987). However, fossils of the family Cyperaceae are uncommon at most sites in Tertiary strata of central North America.