Fritschella is a terrestrial multicellular form which has underground rhizoids, a prostrate stem and erect branches. Chara is the most complex green alga. Phragmoplast line - Nuclear envelope disintegrates at the start of mitosis and the spindle persists after the chromosomes separate. A series of microtubles, the phragmoplast , forms perpendicular to the plane of cell division. The spindle remains until it is broken by either a cell plate or by furrowing.
True plants have a phragmoplast and the nuclear envelope disappears.
This line of the green algae gave rise to true plants 2. A new system of microtubles, the phycoplast , develops parallel to the plane of cell division.