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Life SciencesPlant BiologyPlant SciencesCytoskeletonPlant AnatomyPlant CytologyPollen BiologyPollen DevelopmentPollen MorphologyPollen Wall StructurePollination BiologyExine UltrastructurePollen Exine MorphologyPollen Exine StratificationPollen Exine StructurePollen Grain Architecture
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Evolution and classification of flowering plants
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Carl S. Keener, Arthur Cronquist · Systematic Botany · 1989 · 1.3K citations
Flowering Plants--Origin and Dispersal.
KENNETH R. SPORNE, Armen Takhtajan, Christopher S. Jeffrey · Journal of Ecology · 1970 · 1.2K citations
Pollen-Morphology and Plant Taxonomy: Angiosperms.
H. Godwin, G. Erdtman · Journal of Ecology · 1953 · 991 citations
Pollen Morphology and Plant Taxonomy (Angiosperms)
AIBS Bulletin · 1953 · 408 citations