428 PHARMACEUTICAL BOTANY 
antherozoids are liberated from the antheridia, swim through the 
water to an archegonium and descend the neck canal, one fertiliz- 
ing the egg by uniting with it. This completes the sexual or 
gametophyte generation. The fertilized egg now undergoes 
ed 
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Fic. 319. 
Fic. 320. Fig. 321. 
Fic. 319.—Vertical section through summit of male gametophyte of a Moss. 
Mnium hornum (X 40) an, Antheridia; par, Paraphyses. 
Fic. 320.—A, Antherozoid of Moss (X 1,200); B, Antherozoid of fern (X 700). 
Fic. 321.—Funaria.—A, Apex of female gametophyte with archegonia. B 
Neck of archegonium, showing mode of separation of the ca 
archegonium. (From Small after Sachs.) 
BI 
P cells. C, Immature 
division until an elongated stalk, bearing upon its summit a 
capsule, is finally produced, this entire structure being known as 
the sporogonium. The base-of the stalk remains imbedded 
in the basal portion of the archegonium, at the tip of the leafy 
stalk, and forms a foot or absorbing process. In growing upward 
the sporogonium ruptures the neck of the archegonium and 
