288 SECTION HYGROPHORUS 



Pileus trama interwoven, homogeneous, hyphae radially disposed. 

 Clamp connections present on the hyphae of the gill trama and the 

 cuticle. 



Habit, Habitat, and Distribution — Scattered to gregarious, in 

 humus, in deciduous and conifer woods, Michigan, Tennessee, and 

 Florida, August-January. 



Material Studied — Florida: Hesler 16170, 20255. Michigan: 

 Smith 5005, 5026, 6144, 11127, 15454, 20655, 20935, 32436, 32574, 

 38842, 38852, 43422, 51161, 58114. Tennessee: Hesler 7851, 9709, 14066, 

 14774, 15214, 18284. 



Observations — We have been unable to locate the type of this 

 species, but representative material has been collected and redescribed 

 from Michigan by Smith ( 1934a ) . Continued collecting in the woods 

 from which the first specimens were obtained has brought out certain 

 interesting facts. The greenish spots on the gills and sordid yellowish- 

 green stains on the upper part of the stipe do not always develop — 

 particularly in dry weather. As a result of this observation, and many 

 collections of a species from the West Coast which seemed to be H. 

 olivaceoalbus Fr., we were led to study Kauffman's specimens of the 

 latter. All of his specimens labeled H. olivaceoalbus are similar and do 

 not show any signs of the fuscous fibrillose sheath which is the dis- 

 tinguishing character of that species. Upon comparing specimens of 

 H. paludosus with those Kauffman named H. olivaceoalbus, it was at 

 once apparent that they were the same. Hence we believe that Kauff- 

 man's (1918) description of H. olivaceoalbus actually applies to mate- 

 rial of H. paludosus which did not develop the characteristic stains. In 

 searching the literature for a European species which is closely related 

 to Peck's, one is at once impressed with the similarity of H. fuscoalbus 

 sensu Ricken. The latter is said to grow in coniferous woods, however, 

 and, except for spore size, might be regarded as closer to H. fuligi- 

 neus. 



173 



Hygrophorus fuscoalbus (Lasch) Fr. var. fuscoalbus 



Epicr. Myc, p. 324. 1838 



Agaricus fuscoalbus Lasch, Linnaea 4: 520. 1829. 



Limacium fuscoalbum (Lasch) Kummer, Fiihr. in Pilzk., p. 119. 1871. 



Illustrations : 



Juillard-Hartmann, Icon. Champ., pi. 49, fig. 9. 

 Ricken, Die Blatterp., pi. 5, fig. 1 (as Limacium). 



Pileus 2-5 cm broad, convex, expanding more or less, plane, fus- 

 cous, then cinereous, viscid, glabrous, margin pale, incurved, white- 



