Jakob E. Lange: Studies in the Agarics of Denmark III. 21 



at first convex, then Hat or slightly depressed, brownish fuscous 

 (when dry pale sordid or almost clay-coloured). Stem hollow, 

 often somewhat rooting, dark fuscous, everywhere with white 

 silky fibrils, hase white-tomentose, 4 cm x 5 mm. Gills sordid, 

 paler towards the edge, crowded. Rancid odour not very strong. 

 It differs from Clitocybe ditopoda by the rounded-adnate gills 

 and the ovate spores. My plant appears to he fhe same as 

 described by Sev. Petersen (loc. cit.). 



25. C. mephitica Fr. 



Spores oval, S 1 /* — 4 X 27.2 u, Basidia 4-spored. Cystidia 0. 



Fig. specim.: Ravnholt, gregarious on the ground in wood of 

 Picea, Oct. 1902. — This tiny little mushroom is well characterized 

 by its disagreeable smell and by the dark sordid-gray gills, which 

 are darker than the cap. 



26. C. cessans Karst. 



Spores ovate-globose, 5 1 /* — 6 x 4 1 / 2 — 5 u. Basidia 4-spored. Cystidia 

 on edge eylindric-hairshaped. (1914: Cystidia 60 — 65x10 — 12 (a, 

 slightly swelled in fhe middle). 



Fig. specim.: »Fruens Bøge«, gregarious in w 7 ood of Abies, 

 Oct. 1903. — Also found in several other places 1904 — 14. 



Karstens description fits my plant very well. Fhies (in Epi- 

 crisis pag. 92) describes C. cessans as a variety of C. slolonifera 

 (— tenacella var.), what my plant certainly is not. — Except for 

 the not decnrrent (but horizontal, slightly ventricose, adnatej gills 

 and the very short stem this species is very near to Omphalia 

 stricvpilea Fr. (nee Quélel), perhaps not really distinct. — Sev. 

 Peteksen and Saccakdo describe the spores : 7 — 9 x 5 — 6 jli, much 

 larger than in Karsten's plant (loc. cit. p. 107). 



27 a. C. erosa Fr. 



Spores subrotund-oval, almost spinulose, 7 x 5 1 /» ja. Cystidia 0. 

 (1909 and -14). 



Fig. specim.: Aalsbo, border of walk in wood of Picea, 1909.- 

 Also at Rud me 1914. 



27 b. C. e. forma gracilis. 



Spores 57 2 — 7 1 / 2 x 5 1 / 2 | Ll > nodulose-stellate. Basidia 4-spored. 



Fig. specim : Aarup, mossy ground in Picea-plantation, solitary, 

 Oct. 1904. A slender form, almost like a small Mycena. Cap 

 convex, with a small wart-like umbo, dingy brownish, 0,5 cm 

 broad. Stem 3 cm x 0,6 mm. of the same colour. Gills rather 

 broad, somewhat adnate. 



Quélet (loc. cit.) describes the spores of C. erosa »ovoide- 

 pruniforme« 6—7 \i, but does not mention their warty epispore. 



