MYCENA. 81 



whitish; stem |-1 in. long, slender, curved, downy below; 

 spores 7-8 X 3 /x, ; cystidia absent. 



Agaricus hiemalis, Osbeck, in Ketz., Suppl., ii. p. 19 ; Cke., 

 Hdb'k., p. 91 ; Cke., Illustr., pi. 164s. 



On trunks of trees. 



Closely resembling M. corticola, but clearly differing in 

 the narrow, linear gills, absence of cystidia, and larger 

 spores. 



Difficult to distinguish from M. corticola nnd growing in 

 the same localities, but much more scattered ; stem longer, 

 erect or ascending, scarcely incurved, pubescent below; 

 pileus campanulate, obtusely umbonate, margin striate ; gills 

 narrower, linear; colour constantly paler, whitish, rufons 

 flesh-coluur, &c., scarcely ever bluish-black or brown. 

 (Fries.) 



Mycena corticola. Fr. 



Pileus 2-4 lines across, very thin, hemispherical, obtuse, 

 at length slightly umbilicate, deeply striate, glabrous <>r 

 flocculosely pruinose; colour very variable, blackish, bluish, 

 brown, or grey; gills adnate, with a slight docurrent tooth, 

 broad, somewhat ovate, paler than the pileus; stem about 

 -i in. long, very slender, glabrous or minutely scurf v, p ler 

 than the pileus, incurved, minutely fistulose; spores elliptical, 

 5-6 X 3 /x.; cystidia obtusely fusiform, 50-60 x 8-10 /x. 



Agaricus (Mycena) corticola, Fries, Syst. Myc., i. p. 159 j 

 Cke., Hdbk., p. 90; Cke., Illustr., pi. 164A. 



On bark of living trees, among moss, lichens, &c. 



Allied to M. hiemalis, but distinguished by the presence of 

 cystidia in the broad, ovate gills. 



II. BASIPEDES. 



Mycena pterigena. Fr. 



Pale rose-colour. Pileus about 1 line broad ; very delicate, 

 and thin; campanulate, obtuse, almost even; gill- 1 minute, 

 broad, distant, entire; stem 2-4 lines long, very thin, wav t >, 

 smooth, disc radiately strigose. 



Agaricus (Mycena) pterigenus, Fries, Syst. Myc., i. p. 160; 

 Cke., Hdbk., p. 90 ; Cke., Illustr., pi. 192c. 



On dead fern stems, veins of dead leaves, &c. 



VOL. III. 



