Jakob E. Lange: Studies in the Agarics of Denmark. III. 15 



In Ihis variety the cap is only about 2 cm broad, whitish- 

 hyaline and somewhat transparent. The stem is white, somewhat 

 downy, 8 cm high. The gills are subdecurrent. If the awlshaped 

 cystidia are a constant feature, it must be regarded as a distinct 

 species, although macroscopically very much like small forms 

 of C. radicata. 



3. C. platyphylla Fr. 



Spores ovale-subglobose, generally 6V2 — 8 x 6 — 6 2 / 3 u, epispore 

 thick. (1916: Spores 7^2 — 8V 2 x 6 — 7 fx, pedicel somewhat lateral). 

 Basidia 4-spored, clubshaped, 7 — 8 u broad. Cystidia sackshaped- 

 clubshnped, about 14 jli broad. — The cells of the fibrils on the 

 surface of the cap are ovate-clubshaped, 12 — 25 ju broad, content 

 grayish-brown (1916). 



Fig. specim.: Hjallese, on and around stump of Corylus, June 

 1897. — Not uncommon, especially on and about stumps of 

 Corylus, from early summer. The mycelium always forms thick 

 cottonyarn-like white strings. The form repens figured by Fries 

 Icon. sei. tab. 61) shows this creeping mycelium more luxuriously 

 developed than usual, but should certainly not — as done by 

 Saccardo (Syll. fung. V.) — be put up as a distinct species. 



4. C. rraculata (Alb. et Schw.). 



Spores almost globular, 4 — o 1 /? x 3 — 4 1 / 2 u, (A.) 



Fig. specim.: A) Aarup, wood of Picea, Oct. 1896. B) Trolle- 

 borg, open grassy space about a wood of Picea, Sept. 1897. 



Not rare in woods of Picea and in adjoining open spaces 

 among grass and heather. Figure A. represents the main type: 

 the stout-stemmed form with almost pure white, rather small cap. 

 Fig. B. is the more slender and laxe form with pallid- rufous cap. 

 A yellowish, slender form (C. scorzonera Batsch) is also occasio- 

 nally met with. s 



5. C. distorta Fr. 



Spores globose, 3 1 /, — 4 X 3^ — 3 1 , ._, u. 



Fig. specim.: »Sønderhav near Flensborg, gregarious about 

 stump of Picea, Oct. 1900. — Also found in similar locality at 

 Holte (1900) and Aarup (1910). 



Although habitually very well characterized this species is not 

 clearly distinguished from the preceding species, the slender form 

 of which forms a connecting link. The peculiar denticulate 



marginal veil shown in Fries' figure (Icon. sei. fig. 63 x ) seems to 

 be a licentia pictoria. 



(The plant described by Bicken (loc. cit.) under the name 

 C. prolixa (Fl. Dan.), with serrulate gills and 3 — 5 cm broad cap 

 appears lo be a form of C. distorta. C. prolixa according to 

 Fries is a much larger plant with entire-edged gills). 



