Abstract

The structure of the cone Peltastrobus reedane as re- vealed from specimens in Kansas coal balls is described. The cone con- sists of whorls of six superposed bracts, three sterile alternating with three fertile. The fertile bract subtends a cluster of five peltate sporangiophores, two ascending, one horizontal and two descending. The sporangiophores and their spores are identical to those described by Baxter. Both sterile and fertile bracts bifurcate near their apexes. The cone axis has a triangular protostele. The cone has obvious spheno- phyllalean affinities and is most closely related to the sections Jugati and Conferti of Bowmanites.

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