Any part of a microsporophyll that bears microsporangia is called an anther. Each triangular microsporophyll has two basal pollen producing pollen sacs. Under each microsporophyll is one or several microsporangia (pollen sacs). The scales or microsporophyll, are arranged cylindrically around the pin axis. Each microsporophyll carries on its underside (abaxial side) a variety of pollen sacs.