A Fossil Grass (Gramineae: Chloridoideae) from the Miocene with Kranz Anatomy

  title={A Fossil Grass (Gramineae: Chloridoideae) from the Miocene with Kranz Anatomy},
  author={J. R. Thomasson and M. Nelson and R. J. Zakrzewski},
  pages={876 - 878}
  • J. R. Thomasson, M. Nelson, R. J. Zakrzewski
  • Published 1986
  • Biology, Medicine
  • Science
  • A fossil leaf fragment collected from the Ogallala Formation of northwestern Kansas exhibits features found in taxa of the modern grass subfamily Chloridoideae. These include bullet-shaped, bicellular microhairs, dumbbell-shaped silica bodies, cross-shaped suberin cells, papillae, stomata with low dome- to triangular-shaped subsidiary cells, and Kranz leaf anatomy. The leaf fragment extends the fossil record of plants that show both anatomical and external micromorphological features indicating… CONTINUE READING


    Publications referenced by this paper.
    All modem species of 121 chloridoid genera surveyed by L. Watson have an inner sheath on the prima-ry veins, although it is sometimes absent on the smafi veins
    • 1983
    Although this report assigned a Pliocene age to the fossil, subsequent studies suggest a late Miocene age (12)
    • 1984
    Circadian rhythms and psychiatry.
    • 20
    Living chloridoid grasses such as Cyndon daaylon, Trpgon loliifontis, and Enternpogon aciciaris
    • 1969
    On the basis of evidence from continental drift and the distribution of living grasses of the subfamily Chloridoideae
    • 1972