386 SECTION HYGROPHORUS 



yellowish in Melzer's reagent. Basidia 36-43 X 6-7 /x, 4-spored. Pleuro- 

 cystidia and cheilocystidia none. Gill trama divergent, hyphae 3-6 /x 

 broad. Cuticle of tangled, gelatinous hyphae, more or less erect, narrow 

 (2-4 fi). No hypodermium differentiated. Pileus trama of parallel hy- 

 phae which are radially disposed. Clamp connections on the cuticular 

 hyphae. 



Habit, Habitat, and Distribution — Gregarious or subcaespitose, 

 on the ground in oak woods, Michigan, October. 



Material Studied — Michigan: Kauffman (type, near Ann Arbor, 

 Aug. 23, 1912); Smith 15517. 



Observations — Kauffman commented as follows on this fungus in 

 his unpublished notes: "Distinguished from its relatives by a rather 

 slender, dry stem which is distinctly white floccose-dotted, and by the 

 creamy gills and the spores. H. lividoalbus Fr., it is agreed, has dis- 

 tinctly larger spores. The European species, H. fuscoalbus, is generally 

 said to grow in conifer forests. From H. fuscoalbus (sensu Ricken) it 

 differs by the absence of the glutinous sheath on the stem. 



"The change in color of the pileus during development and on dry- 

 ing out is rather marked. The pileus, in a very fresh or young condi- 

 tion (wet weather) is 'brownish olive' (R) or darker on the disc and 

 'olive-ochre' toward the margin. Under these conditions it is glutinous, 

 shining and even. It dries out rapidly on exposure to a dryer atmos- 

 phere and the surface then becomes much paler, with shades of gray 

 and with a dull lustre. The partial veil is very evanescent/' 



This species by virtue of its dry stipe and small spores is amply 

 distinct from H. fuscoalbus Fr. 



240 



Hygrophorus agathosmus Fr. 



Epicr. Syst. Myc, p. 325. 1838 



Agaricus agathosmus Fr., Obs. Myc. 1: 16. 1815. 

 Agaricus cerasinus Berk., in Smith Engl. Fl. 5 2 : 12. 1836. 

 Hygrophorus cerasinus (Berk.) Fr., Hymen. Eur., p. 410. 1874. 



Illustrations: 

 Fig. 123. 

 Bresadola, Icon. Myc, tab. 319. 

 Juillard-Hartmann, Icon. Champ., pi. 50, fig. 2. 

 Lange, Flora Agar. Dan. 5, pi. 163F. 

 Smith and Hesler, Lloydia 2, pi. 22. 



Pileus (3)4-8(11) cm broad, convex to obtuse with an inrolled 

 margin, becoming plane or with the disc slightly depressed in age, 

 sometimes remaining slightly umbonate, evenly "light drab" or a dull 

 ashy gray, glutinous to viscid, glabrous, margin very faintly tomentose, 



