Fig.1.13. Psilotum nudum. A-F, successive stages in the development of antheridium; G, sectional view of an early mature antheridium; H, immature antherozoids; I, mature antherozoid (spermatozoid).
Fig.1.13. Psilotum nudum. A-F, successive stages in the development of antheridium; G, sectional view of an early mature antheridium; H, immature antherozoids; I, mature antherozoid (spermatozoid).