"Stages in the division of a grandmother cell of microspores or pollen grains of a lily, somewhat diagrammatic.…
Third stage in plant cell division: Protophase 3; "The nuclear thread has divided longitudinally throughout…
Fourth stage in plant cell division: Protophase 4; "The nuclear membrane and the nucleolus have disappeared,…
Fifth stage in plant cell division: Metaphase; "The metaphase, where the longitudinal halves of the…