fossil gymnospermous trees or climbing plants from the Devonian: seed ferns
[ Syn: cycadofilicales , order cycadofilicales , lyginopteridales , order lyginopteridales ]
fossil gymnospermous trees or climbing plants from the Devonian: seed ferns
[ Syn: cycadofilicales , order cycadofilicales , lyginopteridales , order lyginopteridales ]