Plant cells have a cell wall, so it can't pinch in and separate like an animal cell does. So, a plant cell forms a cell plate in the middle, then that becomes a cell wall and new membrane. That's why plant cells are so close together.
The cells of most plants do not have centrioles, although a spindle of fibers is present. Cytokinesis usually, but not always occurs during telophase. The rigid cell wall prevents the formation of cleavage furrow during cytokinesis; instead, a cell plate forms to separate the parent cell into two daughter cells, and a new cell wall forms along the cell plate.
