Sphenopteris sellardsii, a problematical pteridosperm from the Permian of Kansas (The University of Kansas paleontological contributions : Paper)
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Is Archaeopteris a Pteridosperm?
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Pteridosperm Male Fructifications: American Species of Dolerotheca, With Notes Regarding Certain Allied Forms (Classic Reprint)
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A Seed-Bearing Irish Pteridosperm, Crossotheca Honinghausi, Didston (Lyginodendron Oldhamium, Williamson)
Pteridosperm Male Fructifications; American Species of Dolerotheca, With Notes Regarding Certain Allied Forms; Report of Investigations No. 142
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Pteridosperm
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Pteridosperms
Latvian Pteridosperms
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Crescendos Pteridosperms
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