"Rhizopus nigricans. A, Young sporangium, showing columella within; B, older sporangium, with the wall removed, showing ripe spores covering the columella; C, D, views of the collapsed columella after dissemination of the spores." -Gager, 1916

Bread Mold Stages

"Rhizopus nigricans. A, Young sporangium, showing columella within; B, older sporangium, with the wall…