1966 · 272 citations · 0 references
Life SciencesPlant BiologyPlant SciencesPalynologyPlant MorphologyPlant TaxonomyAngiosperm SystematicsFloral MorphologyPollen Aperture TypesPollen BiologyPollen MorphologyPollen Wall StructureAngiosperm ClassificationAngiosperm Pollen MorphologyComparative Pollen MorphologyPollen Grain MorphologyPollen Taxonomy