How many microsporangia are there in each lobe of anther?

A typical angiospermic anther consists usually of two lobes connected together by the connective tissue. Each lobe of the anther contains two pollen sacs or microsporangia. Thus there are four pollen chambers of four microsporangia in each anther. Such anthers having two anther lobes and four microsporangia or pollen chambers called dithecous anther.