lg Dansk Botanisk Arkiv, Bd. 2, Nr. 11. 



Aug. 1904. — Very common, generally forming »fairy-rings« by 

 its parasitic growth. 



[M. argyropas (Pers.) I consider synonymous with Collybia 

 confluens (vide part III of these Studies).] 



ß. CARTILAGINEI. 



5. M. globularis Fr. 



Spores 6—7 x 4 \x, broadly pipshaped. 



Fig. specimens: Hjallese, wood of Fagus, Oct. 1895, subfasei- 

 culate. Rather common in woods of Fagus (and Picea). — 



Like Ricken I see no real difference between this species and 

 M. Wynnei Berk, and M. fuscescens Schroet. 



6. M. cohærens (Pers.) (M. erythropus Schroeter.) 



Spores 9— 9V 3 x 5 u, obovate-pipshaped, base somewhat oblique. 

 The face and especially the edge of the gills is generally (but 

 not always) set with long, brown, acute, awlshaped setulæ 

 (about 50 u x 7—8 u). The surface of the cap is formed of 

 basidiiform, hyaline cells the top of which are crowned with 

 numerous small brown borsts. Among these cells are isolated 

 setulæ like those on the gills. 



Fig. specimens: Hjallese, copsewood, Sept. 1897 and 1898. Not 

 uncommon. Fbies places this species in Mycena. I consider 

 Mycena balanina Berk, identic. Ricken and others give M. cera- 

 topus Pers. as a synonym. 



7. M. lupuletorum (Weinrn.) Bres. (nee Fries). 



Spores 9 x 4 1 /« M pipshnped. Cystidia on edge obovate, 20X11 u. 

 Setulæ on stem brown, acute, 60 x 6 u, 



Fig. specimens: Ålykkeskov near Odense, on the ground 

 amongst dead foliage, twigs etc., Aug. 1918. Rather common. 



Differs from the preceding species by the cap not being prui- 

 nale and generally of a paler colour, and by the stem which is 

 everywhere minutely powdery-flocculose (from the setulæ). — It 

 is rather peculiar that these brown setulæ which in the .one are 

 found on the cap and gills, but" not on the stem, are in the 

 other wanting on the cap and gills but present on the stem. — 



Bresadola~(1oc. cit. tab. 130) describes and figures this species 

 with a short incurved stem what I think rather abnormal. 

 Rickens description is more to the point. Fries' (Collybia) lupu- 

 lelorum (Weinm.) is totally different; but some authors think his 

 M. erythropus is a synonym to M. lupuletorum as here under- 

 stood' (not to no: 6), although he describes its stem as glabrous. 



[The characteristic little species M. cauticinalis (With.), which 

 is not uncommon in the Scandinavian pinewoods, is probably 

 also to be met with in similar localities in Denmark. It differs 

 from all the other species by the clear yellow, decurrent gills.] 



