192 



MANUAL OF POISONOUS PLANTS 



Fig. 34. Chlorophyceae. Pond Scum. 

 Pandorina Morum. a. Floating caenobium. b 

 and c. Zoospores. d. Zoospores conjugating, 

 e. Process of conjugation complete, f. Zygo- 

 spores. After Luerssen. 



Fig. 35. Bladder Wrack. Fucus vesiculosus. a. Section through conceptacle contain- 

 ing oogonia. b. Single oogonium with egg cells, c. Egg cells escaping, d. Antheridium 

 with sperm cells. e. Egg cells in process of fertilization, surrounded by sperm cells. 

 /. Germination of spores, rhizoid below, g. Single sperm cells. After Thuret. 



