324 SECTION HYGROPHORUS 



reagent. Basidia 30-37 X 4.5-6 /*, 4-spored. Pleurocystidia and cheilo- 

 cystidia none. Gill trama of hyphae only slightly divergent, appearing 

 subparallel in some lamellae, 4-8 n broad. Cuticle of appressed, some- 

 what gelatinous hyphae. Clamps present in gill trama. 



Specimens larger than the type have been found by Smith. In 

 these specimens the spores are slightly larger than in the type, and the 

 gill trama of dried material shows divergent hyphae which tend to be 

 subparallel. 



In Europe H. russocoriaceus seems to be very similar. Bataille 

 (1910) and Niiesch (1922) place it in the subgenus Camarophyllus. 

 Peck's species without question belongs in section Hygrophorus and 

 differs from descriptions of the European species in its slightly colored 

 disc of the pileus. Kauffman collected it in New York and Washington, 

 and Smith found it growing in great quantities in southern Oregon and 

 northern California. The odor and slightly colored pileus distinguish 

 H. pusillus from H. piceae. Moreover, the carpophores of the latter are 

 usually larger than in the former. 



Fig. 101. H. pusillus 



