M3I1C3R1O1S1P3O1R1A1N1G2I1U1M3
24 points
MICROSPORANGIUM is validvalid
the sporangium in heterosporous plants where the microspores develop
the sporangium in heterosporous plants where the microspores develop
the sporangium in heterosporous plants where the microspores develop
the sporangium in heterosporous plants where the microspores develop