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"Stages in the division of a grandmother cell of microspores or pollen grains of a lily, somewhat diagrammatic. 4, parallel threads uniting." -Stevens, 1916

Division of Grandmother Cell Stage 4

"Stages in the division of a grandmother cell of microspores or pollen grains of a lily, somewhat diagrammatic.…

Fourth stage in plant cell division: Protophase 4; "The nuclear membrane and the nucleolus have disappeared, and the nuclear thread has become segmented into chromosomes which are assembling at the equator of the cell." -Stevens, 1916

Plant Cell Division 4

Fourth stage in plant cell division: Protophase 4; "The nuclear membrane and the nucleolus have disappeared,…