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. Pucus vesiculosus. a. Section through conceptacle contain- 

 ing oogonia. b. Single oogonium with egg cells, c. Kgg cells escaping, d. Antheridiunl 

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

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



