Mycorrhizae of Wading River region, L. I. 

 I.. K. 1 Iknry 



In the summer of 1°31 and 1932 the writer collected root- 

 lets of thirty-six different trees and shrubs from Wading River 

 region, Long Island. These collections were made in the vicinity 

 of Deep Pond located in a pine-barren community whose pre- 

 dominant soil type is Sassafras loam with a narrow projecting 

 arm of Sassafras sandy loam on the northwest side. The soil 

 of the area immediately bordering the lake, however, where the 

 rootlets were collected belongs to the Babylon sand which con- 

 sists of a brownish-yellow sand to a depth of three feet. There is 

 no differentiation into layers, other than a slightly darker 

 colored surface -due to incorporation of some organic matter. 1 

 The Babylon sand as well as most of the other soils of the area, 

 showed a decided acid reaction according to a statement re- 

 ceived from Loundsbury. Although this soil is unimportant ag- 

 riculturally, one finds oaks, hickories, pitch pines, a few birch 

 and ericaceous shrubs flourishing. 



These rootlets were preserved in 5% formaldehyde until 

 there was an opportunity to prepare microscopic slides from 

 them. Mycorrhizae were found in all thirty-six collections with 

 the ectotrophic type predominating. 



Mycorrhizal Hosts and Types 



The following list of trees and shrubs was investigated and 

 found to be mycorrhizal hosts either for the ectotrophic or 

 endotrophic type of infection. So far as the writer knows, the 

 species indicated by an asterisk are new additions to the list 

 of mycorrhizal hosts. 



Ectotrophic: (Ectendotrophic type included) 

 Conifers 

 Jnniperiis virginiana L. 

 Pinns resinosa Ait. 

 Pinus rigid a Mill. 

 Pinus Strobus L. 

 Pinus virginiana Mill. 



1 Loundsbury, Clarence, and others. Soil Survey of Suffolk and Nassau 

 Counties, New York. Bureau of Chemistry and Soils, (U. S.) 1928, No. 28. 



Ill 



