Simple Plants With Chlorophyll — Algae 163 



ATitKeridium 



A 



B 



crw 



Irich' 



.IrichoqMTie 



CarpocjoniuTd 



Carpospore 



c 



Fig. 63. — Red alga (Nemalion) of the phylum Rhodophyta. A, Portion of a 

 forked, cylindrical body (thallus) which grows attached to rocks along the sea- 

 coast; B, portion of a branch bearing brushlike filaments whose tips divide into 

 antheridia, each of which contains a nonmotile sperm (spermatium) ; C, portion 

 of a branch bearing a basal carpogonium (with an egg) and an elongated tricho- 

 gyne; a nonmotile sperm, carried by water, descends the trichogyne to unite with 

 the egg to form a zygote ; D, portion of a carpogonium showing asexual, nonmotile 

 carpospores being produced by the zygote; the released carpospores germinate into 

 new Nemalion plants. 



