Beschreibung:
<p>A large number of specimens including ovulate cones, pollen cones, pollen, and ovules assignable to the Upper Pennsylvanian shrubby cordaitean Cordaixylon dumusum Rothwell and Warner are described from the type locality for the species. Most specimens are isolated in the matrix, but a few are attached to stems. Some of the ovules are attached to cones, and pollen is preserved in the pollen sacs of other cones. This material provides the first evidence of cone attachment, pollen cone structure, and pollen for C. dumusum, and adds significant new data for the interpretation of ovule ontogeny, phenology, pollination biology, and ecological tolerances of the species. Together with newly developed quantitative data about the frequency of organs and associations of plants in the coal-forming peat, these data provide a basis for interpreting the growth ecology of C. dumusum and for developing an understanding of its role in plant community dynamics and in successional ecology of the peat-forming swamp.</p>