SYMBIOSIS IX I'EUX I'ROTH ALl.l A 



L61 



cells, L e. f those with the filamentous . 

 x) and those containing the irregular v 

 (y), are well di t't'ei-ent iated, but are m 

 larly mingled. The "conidia" (Fi{ 

 smaller and less nnmerous than in 

 Ophioglossum, but have a much fin 

 Jeffrey has described. These conidia 

 Jeffrey to germinate by sending out 

 are supposed to be special organs of ] 

 In a very important study of the enc 

 of the saprophytic orchid, Neottia, 

 shown that two types of mycelium exh 

 phytes are of very different nature, 

 drical hypha? constitute the active por 

 which behaves like a parasite toward 

 invades, destroying the starch and p 

 stituents of the cell, but not attacking 

 latter becomes much hypertrophied, a 

 is not seen in the endophyte of the Opl 



structure and is itself destroyed by the cells 

 which actually digest these fungus mycelia i 

 same wav that the cells of Drosera digest 

 Some interesting similarities in the behavior 

 tents of the digestive cells of Drosera and th< 

 humus saprophytes have been demonstrate. 

 A and B, show some of these cells in Botn 

 varicose mycelium has very delicate walls, 

 older cells (Fig. 2, B) they seem to be disinter 

 finally the structure is completely des trove 

 a structureless lump is left. Tn Xeottia tin- 



rounded with i 

 separating it 

 tion is comple 



