Contents: Introductory note,A historical sketch and current researches,Morphological evolution in spores,The material,Technique of spore preparation,Spore descriptions and analysis,Systematic spore morphology,Ophioglossaceae,Angiopteridaceae,Marattiaceae etc..,Analysis of spore morphology and taxonomy,Plagiogyriaceae,Anemiaceae,Parkeriaceae,Lygodiacea etc..,References,Glossary of terms,Details of materials used,Index.