FUNGOUS ROOT-TUBERCLES. 



87 



tubercle is indicative of some relationship with the atmos 



but 



ments 



somewhat difficult to place this fungus systematically 

 when one can judge its morphological characteristics only 

 from the form found within the host cells. Harshberger (15) 

 favors the view of locating it among the Oomycetes, but 

 judging from the characteristics as noted, it cannot properly 

 be considered to belong to that group. Shibata (38) is prob- 



Migula in his System 



tinomyces as denned by 

 gy. Pecklo (29), in his 



dotroph 



1/ / 



fungus from the tubercles of 



am 



>ngst plants. In the 302 

 given in Kolle and Wasser- 



lated an Acti7wmyces-\ike 



Myrica Gale, apparently the 



that has ever been reportec 



references on Actinomyces, 



mann's Handbuch der pathogenen Mikro-organismen (19) 



no mention is made of such organisms infecting plant cells 



yet a large number of these pathogenic forms, in the earl; 



stage of their life history, live in the intercellular spaces of 



i 



myces from 



similar form 



may inhabit the root tubercles of Myrica 



COMPARISON AND DISCUSSION. 



Although the tubercles and fungus on Ceanothus, 

 Elaeagnus and Myrica have been considered the same or 

 quite similar by several investigators, a comparative study 

 shows that a number of variations may be noted in the 



fungu 



ma 



tubercles 



common 



Leguminosae. 



Differences regarding the number and location of the 



fou 



ful as on Ceanothus. 



and Myrica 1 

 Myrica cerif 



from 



