Jakob. E. Lange: Studies in the Agarics of Denmark. IV. 9 



[P. aegerita Brond. I have seen a specimen of a fungus 

 (found in northern Sjælland growing on an old board) which 

 probably was a true P. ae. The spores were 9 x 5 u, sub micr. 

 transparent, light brownish-yellow. The cap looked like a large 

 P. præcox. This somewhat dubious record is the first for Den- 

 mark, I believe, of a representative of this South-European tribe.] 



10. P. adiposa Fr. 



Spores 5V 2 — 6 2 / 3 x 'S 1 ^—^ 3 ^ u, oval, smooth, sub micr. pale 

 brownish-yellow, Basidia 4-spored. 



Fig. specimens : Hesbjerg, clustered at the base of stumps of 

 Fagus. — Rather common, generally fasciculate on (and occa- 

 sionally in the vicinity of) stumps of Fagus. 



Although this agaric is one of the most characteristic species 

 (and rather common) authors disagree very much about it. Thus 

 Quélet (and Saccardo) says the spores are about 9 (a long. And 

 Fries himself (in Hymenomyc. Europæi) describes it as »intus 

 albus«, while in fact the flesh of the cap is pale yellowish, that 

 of the stem yellow. 



11. P. aurivella (Batsch) 



Spores 8—9 x 5 u (or l 1 /,-9 x 4 3 / 4 — ö 1 /«). 



Fig. specimens: »Fjellebro« near Egeskov, fasciculate on dead 

 Alnus(?) (several meter from the ground), Oct. 1900. (Also found 

 at »Fruens Bøge«, on Fagus, Oct. 1914 and at Krabbesholm (on 

 Juglans), Oct. 1918, in both cases nestling in small clusters in 

 decaying knotholes of living trees). 



Very well characterized by the triangular, broad, adpressed, 

 dark bay-brown scales on the yellow or subferrugineous cap. 

 Fries describes the cap as »subviscido«. But whenever I have 

 seen it I have found the surface of the cap strongly slimy. I 

 have never met with this species on stumps or at the foot of 

 trees. 



11a. P. auriv. var. 



Spores 9 x 5 — 5V 3 u, oval-ovate, sub micr. yellowish-brown 

 (Spore-powder dark cinnamon). Cystidia hairshaped, short. 



Fig. specimens: Fruens Bøge, solitarv on living Fagus, Oct. 

 1912 (and 1917) and on another beech Oct. 1914. 



Differing from the type by the pale yellow (central part some- 

 what ferrugineous) cap and the stem which up to the ringlike 

 zone is densely clad with recurved squarrose scales which at first 

 (like the stem) are whitish, but soon turn brownish-rusty (from 

 base upward). — Is this P. cerifera Karst. (Mvcologia Fennica 

 III p. 169)? 



12. P. squarrosa (Müll.) 



Spores 7 — 8 x 4 u, ellipsoid-oval. I have also met with speci- 

 mens of this species (on Fraxinus) with somewhat smaller spores 



