Development of microsporangium in angiosperms and gymnosperms is of:

Microsporangium development in both angiosperms and gymnosperms follows the eusporangiate type, where the sporangium develops from a group of initial cells (multicellular origin). Leptosporangiate development occurs in some ferns where the sporangium arises from a single initial cell. Monosporic and tetrasporic refer to embryo sac development types in angiosperms, not microsporangium development.