MYCEXA. 81 



Tvhitish ; stem ^-1 in. long, slender, curved, downy below; 

 spores 7-8 x 3 /^ ; cystidia absent. 



Agaricus hiemaUs, Osbeck, in Eetz., Suppl., ii. p. 19; Cke., 

 Ildbk., p. 91 ; Cke., Illustr., j^l. 1G4b. 



On trunks of trees. 



Closely resembling M. corticola, but clearly dififering in 

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

 spores. 



Difficult to distinguish from M. corticola and growing in 

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

 erect or ascending, scarcely incurved, pubescent below ; 

 2)ileus campanulate, obtusely umbonate, margin striate ; gills 

 narrower, linear; colour constantly paler, whitish, rufons 

 flesb-coluur, &c., scarcely ever bluisli-black or brown. 

 (Fries.) 



Mycena corticola. Fr. 



Pileus 2—1 lines across, very thin, liemispherical, obtuso, 

 at length slightly umbilicate, deeply striate, glabrous iv 

 flocculosely pruinose; colour very variable, blackish, bluish, 

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

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

 V in. long, very slender, glabrous or minutely scurfy, p der 

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

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



Agaricus (J\Iijcenci) corticola. Fries, Syst. Myc, i. p. 159; 

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



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



Allied to M. liiemalis, 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; gills adnate, 

 broad, distant, entire; stem 2-4 lines long, very thin, wavv , 

 smooth, disc radiately strigose. 



Agaricus (Mijcena) pierigenus, Fries, Svst. Myc, i. p. 16'J; 

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



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



VOL. III. G 



