| geastrum | (n) type genus of Geastraceae; fungi whose outer peridium when dry splits into starlike segments, Syn. genus Geastrum |
| geastrum coronatum | (n) an earthstar with a bluish spore sac and a purplish brown gleba; at maturity the outer layer splits into rays that bend backward and elevate the spore sac |
| Geastrum | prop. n. The type genus of the |