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



(6y 2 x 3Vi M) and obovate-clubshaped cystidia (8—10 u broad) 

 with or without a short hairlike appendix. 



Fig. specimens: Hjallese, fasciculate on foot of Quercus, Oct. 



1895. — Rather common, on various trees (Malus, Robinia 

 Picea etc.). 



13. P. flammans Fr. 



Spores 4—5 x 5V 2 u. ellipsoid. Cystidia crowded, rather obtuse, 

 cylindric-bottleshaped, total length about 30 u. 



Fig. specimens : Kumpedal near Kellerup (Jyll.), on stump of 

 Picea, Sept. 1897. Rather rare. 



14. P. spectabilis Fr. 



Spores 8—10 x 5— 5V 2 M, ovate-ellipsoid, minutely granulate. 

 Cystidia crowded, obtuse, hairshaped, apex slightly swelled. 

 Basidia 4-spored. 



Fig. specimens: Dyrehaven near Copenhagen, on foot of living 

 Crataegus, Oct. 1897. Not uncommon on stumps and at the 

 base of old trees (Ulmus, Fagus, Quercus etc.). 



The plant varies very much in size (from 4 cm to 23 cm 

 broad) and surface of cap (from almost smooth, slightly fibril- 

 lose to almost squarrose). 



ß. HYGROPHANÆ. 



15. P. mutabilis (Schaeff.) 



Spores 6 — 7 x 4 — 5 u, ovate-ellipsoid. Cystidia crowded, short, 

 hairshaped, apex slightlv swelled and rounded, free portion about 

 12—14 u long. 



Fig. specimens: Hunderup, on stump, densely fasciculate, June 

 1901. Common, exclusively on foliaceous trees, from spring till 

 late in the autumn. 



16. P. marginata (Batsch) 



Spores 8V 8 x 5 1 /* M» ovate-ellipsoid (1896) or l 1 ^— 9 x 5— 5 l / 2 u. 



Cystidia hairshaped, apex obtuse, base somewhat inflated (1910). 



Fig. specimens: Hjallese, on stump of Picea, fasciculate, Oct. 



1896. — Typical form rather rare, generally confined to coniferous 

 wood; but I have also (1910) seen it growing on stump of folia- 

 ceous tree (Fagus?) — a form with very narrow and crowded 

 gills. 



17. P. unicolor (Vahl) 



Spores A: 7 1 / 3 — 9 x 4y 2 — 5 u, ovate or ovate-ellipsoid. B: 9— 10X 

 5— ö 1 ^ H- Cystidia obtuse, hairshaped, base somewhat inflated 

 (6—9 u), free portion 40 — 50 ja long. 



Fig. specimens: A. Hjallese, on stump of Salix capræa, solitary 

 Oct. 1898. B. Hjallese, on rotten stump of Picea (a number of 

 specimens) Oct. 1898. 



