200 



CUYPTOGAMS 



Section of tlie disk; a, an- 

 theridiii. 



465. Beproduction. — Upon the iqaper surface, over the 

 axes of growth, or midribs, small ciip-sliaped structures 

 called cujjiilcs {l^ig- 3o4, A, c) are found. From the bottom 

 of each, several small lens-shaped bodies, composed of a con- 

 siderable numljer of cells, arise ; they are known a^ gemmce 

 (literally buds). When set free and scattered by rains and 

 running' water they develop directly into new pilants. 

 This is veijetative 'propagation much resembling the propa- 

 gation of Jjilies by bull)lets and various other Flowering 

 Plants by offsets. Gemmpe serve the same juirpose as 

 zoospores in tlie Algte, namely, rapid multiplication. 



466. A !<econd reproductive 2?rocess is now to be de- 

 scribed, in which gametes much like tlie equivalent bod- 

 ies in Algas 

 take part. In 

 late spring 

 and in ear- 

 ly summer 

 erect, more 



or less umbrellalike, branches are 

 found. They are of two kinds. In 

 one case (^antheridial brancJies, Fig. 

 300) the termination is a disk with 

 scalloped margin. In the other the 

 stalks end in a disk from which 

 fiugerlike rays 

 project (Fig. 

 oo4); these are 

 the arcJiei/onial 



oSC>. Aiitiieiidial liriLncli. , , '' -^ 



branches. In 

 depressions of tlie scalloped disks 

 stand the short-stalked antheridia. 

 The Lii-ge cell of the anther- 

 idinm (Fig. SoS) Ijecomes divided 

 into a great jnimljcr of smaller 



cells, in each of wllicll a single 3:58. Antheridium: antUer- 



antherozoid is foimed. The an- '""''^^ f"^)- ^^'g^y 



magnified. 



therozoids are like those of Rock- —Sachs. 



