Jakob E. Lange: Studies in t he Agarics of Denmark. 111. 9 



13. P. cinereo-fuscus J. E. Lange. [P. nanus nar. major Cooke). 

 Plate III lig. 1. 



Spores subglobose-oval, 8 — 10 X 6 — 7 ja. Cystidia rather obtuse, 

 inflated fusiform or ellipsoid, hyaline, 12 — 13-.fi broad. Cells from 

 surface of cap globular, subfuscous, 35 — 50 u diam. — The cystidia 

 on the sides of the gills similar to those on the edge (1914). 1910: 

 Spores 7 1 / S —S 1 I 2 X 5% — 6V4", cells on cap 25— 45 u. 



Fig. specim.: Fruens Bøge, gregarious, on heap of leaf-mould 

 Oct. 1897 (and 1898—1916). — Also found on leaf-mouldy ground, 

 Hjaliese, Aug. 1912 and Aug. 1914. 



This plant undoubtedly is identical with P. nanus forma 

 major Cooke (Illustrations, plate 305 c), but is — I think — betler 

 conceived as a distinct species, differing from P. nanus not only 

 by its larger size but also by the characteristic glauco-cinereous 

 colour (almost like P. salicinus). I add a brief diagnosis: 



Pileo 3 — 5 cm lato, ex subcampanulato expanso, sub lente mica- 

 ceo-pnlverulento, glauco-cinereo (umbo subfuscus), sub-hygrophano, 

 margine hinter rugoso-striato; stipile 6— S cm x v j. 2 cm, cavo, albo, 

 undo, sericeo-substriato; lameltis subconferlis, ex albo salmoneo- 

 subroseis. Spor a' et cyst, ut supr. 



14 a. P. nanus (Pers.). 



Spores almost globose, 7 — 7 7* x 6 — 67 3 M- Cystidia cylindric- 

 bladdershaped. 



Fig. specim.: Hjaliese, on the ground in mixed copsewood, 

 Sept. 1897, solitary. - — Rather common, as well on the ground 

 as on rotten stumps. 



14 b. P. nanus var. lutescens. 



Spores almost globose, 6V 2 — 7 X 5 1 /»— 6 u. Cystidia cylindric- 

 bladdershaped, 11 — 25 u broad. — Cells on surface of cap globular, 

 30—45)11 diam. (1915). 



Fig specim.: Revninge, in the head of an old pollarded Populus, 

 Oct. 1899. -- Also Ollerup (on stump of Populus) and in other 

 localities. 



15. P. chrysophæus (Schaell.). 



Spores subglobose, 67i x 5Vi u. Cystidia obtusely fusiform, sub- 

 ventricose, inflated. Cuticle formed of subglobose yellowish cells 

 about 30 ft diam.). 

 Fig. specim.: Hollufgaard, on Fagus and Populus, Sept. 1916. 



Spores etc. of all the species are figured on plate I. 



