n] 



MYCORHIZIC HABIT 



47 



The climbing and humus habits are connected in Flowering Plants on 

 the one hand with parasitism, and on the other with mycorhiza. The former 

 is not seen in the Filicales, but a number of Ferns have adopted mycorhiza. 

 It is found in its most complete form in the gametophyte of the Ophioglos- 



Fig. r- 



rialyco-iion coronariitiii {hiforinc), .showing epiphytic habit. 

 Buitenzorg. (After von Goebel, from Christ.) 



saceae, where it has advanced to the state of complete saprophytic nutrition 

 of the underground prothallus (see Chapter Xlll). But the mycorhizic fungus 

 invades the young sporophyte also. In Botrychiinn Ltmaria, which has m\'- 

 corhizic roots from the first, the eighth or ninth leaf of the sporeling is the 



