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GENERAL CHARACTERS OF CRYPTOGAMS 



rocks. The stem is branching and bears the reproductive bodies (Fig. 

 593) at the ends of its branches. 



Fig. 592. Rock Weed, Fucus: A, portion of branch bearing reproductive organs, /; B, an enlarged 

 section through a reproductive organ, the female conceptacle, showing egg cells, c; the cavity, b; 

 false parenchymatic tissue, d. (After Thuret.) 



Fig, 593. The sexual organs of Fucus: A, the antheridia, or male organs, a, borne on paraphyses; 

 B, antherozoids or gametes; I, the oogonium or female organ, og; paraphyses, p; //, the oospores 

 Coospherea), preparing to bo set free; III, a free oospore, being fertilized; IV, V, young Fucus plants. 



