SUBSECTION CAMAROPHYLLI 379 



Pileus 5-8 cm broad, convex, expanding to subumbonate, often 

 viscid around the margin at first, soon dry, whitish to pinkish tan or 

 stramineous on die center. Context white, compact; odor none, taste 

 pleasant. 



Lamellae slightly decurrent, pale, subdistant. 



Stipe 4-6 cm long, 10-15 mm thick, white, apex wTiite-furfurace- 

 ous, dry. 



Spores 5-6(7.5) X 3.5-4 ^, ellipsoid, smooth, yellowish in Melzer's. 

 Basidia 37-48 X 4-6 /*, 2- and 4-spored. Pleurocvstidia and cheiloevs- 

 tidia none. Gill trama divergent, hyphae 4-5 fx (both narrow and broad 

 hyphae abundant). Cuticle a gelatinous zone, 100-150 p thick. Clamp 

 connections on the cuticular hyphae. 



Habit, Habitat, and Distribution — In woods, especially beech 

 in Europe, Washington, September. 



Material Studied — Washington: Kauffman, Rockdale, Sept. 18, 

 1915; Smith 62135. Denmark: J. P. Jensen (Hesler 23970). france: 

 Heinemann 1720. 



Observations — We refer our collection (Smith 62135) to H. pe- 

 narius with an awareness that descriptions of European material are 

 not always in full agreement. Our collection agrees very well with a 

 specimen from France, communicated by Dr. P. Heinemann, Gem- 

 bloux, Belgium; and with a collection from Denmark, received from 

 Mr. J. P. Jensen, Copenhagen. It is apparent that there is some varia- 

 tion in the width of the spores, and in the thickness of the stipe. 

 Bresadola (1928) states that the odor is slightly butyric. 



The problem is whether H. penarius and H. sordidus are actually 

 different. A careful comparison of these two should be made with 

 emphasis on chemical characters. 



SERIES CAMAROPHYLLI (Fr.) stat. nov. 



Section Camarophvllus Fr. (as "Tribus"). Epicr. Svst. Mvc, 

 p. 325. 1838. 



Genus Camarophvllus (Fr.) Kummer, Fiihr. in Pilzk., p. 117. 1871. 



Characters as given in the key to series, page 309. 



Type species: Hygrophorus camarophyUus (Fr. ) Kummer. 



Key to Species 



1. Spores tvpically ( 10) 11—13 ^ or more long 2 



1. Spores tvpicallv 6-10 ^ long 5 



2. Pileus dry, fibrillose squamulose; stipe surface streaked with dark 

 fibrils and dry 235. H. inocybiformis 



2. Pileus viscid when young and fresh 3 



