abnormal cell wall morphology during vegetative growth cell wall invagination into cytoplasm cell wall invagination into cytoplasm during vegetative growth cell wall invagination into cytoplasm during mitotic cell cycle 2014-08-18T13:12:11Z FYPO:0003697 A physical cellular phenotype observed in the vegetative growth phase of the life cycle in which one or more extensions of the cell wall protrude into the cytoplasm. The cell wall extensions do not form a normal septum. midori