Question

what is the meaning of mother axis?

Answer 1

Mother or the floral axis is the peduncle or stalk that bears flowers and all floral parts are drawn in accordance with position of this axis. 

Answer 2

Answer:

we must have seen the the flowers are always arranged in the special sequence and around the special kind of the axis. The mother axis is that axis which have that stalk that bears the flower of a plant and this is the major axis around which the other parts of the flower are drawn.