This dissertation research examines two interrelated topics regarding the Late Woodland through Mississippian period paleoethnobotanical record from the eastern United States: (1) is there evidence for prehistoric medicinal plants in this body of data; and (2) if medicinal plants are present, did ...
What are the main forms of reproduction in plants?What is the name given to plants that develop from dry conditions?Approximately how long was it between the first distinct seed plants appearing during the Mississippian period and the first gymnosperms appearing in the Pennsylvanian period? A. 3...
The fossil plantElkinsia polymorpha, a “seed fern” from the Devonian period—about 400 million years ago—is considered the earliest seed plant known to date. Seed ferns (Figure 2) produced their seeds along their branches without specialized structures. What makes them the first true seed pl...
Despite algal lineages inhabiting the terrestrial environment for a considerable preceding period, they failed to evolve complex multicellularity necessary to conquer the land. About 470 million years ago, one lineage of charophycean alga evolved complex multicellularity via developmental innovations in ...
(progymnosperms) most likely originated in the Paleozoic era, during the middle Devonian period: about 390 million years ago. The previous Mississippian and Pennsylvanian periods, were wet and dominated by giant fern trees. But the following Permian period was dry, which gave a reproductive edge ...
in non-root structures (e.g., bryophytic rhizoids). Fossil spores of Glomeromycotina have been reported as early as the Ordovician;22however, no association with plants has been reported from this period. The earliest known AM fungus was reported from a fossil from the Early Devonian (≈...
This trend begins during the Late Archaic, and by the Middle Woodland and continuing through the Late Woodland and into the Mississippian period, the starchy seed complex dominates the seed counts at archeological sites. The assembled data on Fort Ancient plant remains from nearly fifty sites in ...
WMSHS is the site ol a Native American village and mound center from the Mississippian culture or Mississippian period circa A.D. 1000-1350. It is located on a loess bluff at the terminus ofthe Loess Bluff Hills of the Mississippi Alluvial Plain overlooking the Mississippi River near the ...