212 



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.) 



LAJ 



^^^#^'- 



Fig. 593 The sexual organs of Fucus 4, the antheridia, or male organs, a, borne on paraphyses; 

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

 (oospheres), preparing to be set free; ///, a free oospore, being fertilized; IV, V, young Fucus plants. 



