Pteridophyte
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A pteridophyte is a vascular plant with xylem and phloem that reproduces by means of spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", me
Lycopodiella inundata 001
Pteridophyte life cycle
Lycophyte
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The lycophytes, are a clade of vascular plants that reproduce with spores. When broadly circumscribed, they include the clubmosses. They are sometimes placed in a division Lycopodiophyta or Lycophyta
Pteridophyte
…they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. Ferns, horsetails (often treated as ferns), and lycophytes (clubmosses, spikemosses, and quillworts) are all pteridophytes. However, they do not form a monophyletic group because ferns (and horsetails) are more…
Lycopodites, an early lycopod-like fossil
External mold of Lepidodendron from the Upper Carboniferous of Ohio.
Lycopod bark showing leaf scars, from the Middle Devonian of Wisconsin.
Fossil in situ lycopsid, probably Sigillaria, with attached stigmarian roots.