On the Megagametophytes of Two Lepidodendracean Cones

@article{BrackHanes1978OnTM,
  title={On the Megagametophytes of Two Lepidodendracean Cones},
  author={S. D. Brack‐Hanes},
  journal={Botanical Gazette},
  year={1978},
  volume={139},
  pages={140 - 146}
}
Lepidodendracean fructifications with well-preserved megagametophytes are described from Pennsylvanian petrifactions of eastern Kentucky. One cone is megasporangiate with one functional alate spore in each sporangium; the other cone is bisporangiate with spinose megaspores and papillate microspores. Both strobili have megaspores that contain prothallia with rhizoids and well-developed archegonia. Ontogenetic stages of megagametophytic development in these cones are comparable to stages that… Expand
Megagametophyte Development in the Chaloneriaceae Fam. Nov., Permineralized Paleozoic Isoetales (Lycopsida)
On a Lycopsid Cone with Winged Spores
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