IIS 



roots. The internal structure showed the usual features, such 

 as pseudopareut h\ ina or prosenchyma fungus mantles, inter- 

 cellular net (Hartig's net I between the cortical cells, and hyper- 

 trophy of cells of cortical region I Fig. 1 1. 



The hyphae projecting from the fungal mantles of two of 

 the ericaceous shrubs namely, Lyonia mariana (Fig. 2) and 

 Kaltnia latifolia, showed clamp connections very clearly. This 

 is, at least, an indication that these myeorrhizae are produced 

 by association with basidiomycetes. 



Quercus coccinea, Quercus prinoides, Salix pentandra, and 

 Sassafras variifoliiim possessed, in addition to the normal coral- 

 loid form, some tuberculate myeorrhizae. These are character- 

 ized by the presence of a fungal mantle common to several 

 myeorrhizae. In nearly all cases the myeorrhizae were well de- 

 veloped, a fact which maybe attributed to the decidedly acid 

 reaction of the loose quartz sandy soil. 



Summary 



Myeorrhizae, 29 of which were ectotrophic and 7 endotro- 

 phic have been found on 36 different trees and shrubs from 

 Wading River region, L. I. Among these 14 are new additions 

 to the list of mycorrhizal host plants. 



Carxegie Museum 



