[Vol. 12 

 314 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



cystidia incrusted, conical, pointed, fusiform, 50-90 X 8-20 y., 

 wholly immersed or protruding up to 50 y.; spores hyaline, even, 

 depressed on one side. 



Fructifications 2-6 cm. long, 1-3 cm. wide. 



On decaying wood, logs and limbs of frondose species, rarely on 

 conifers. In Europe and from Canada to Louisiana and west- 

 ward to British Columbia and Oregon. May to January. Com- 

 mon. 



P. pubera is characterized by having gloeocystidia, large, con- 

 ical, heavily incrusted cystidia, and spores usually 7-9 X 33^-4 y.. 

 The gloeocystidia show well in my permanent mounts in glyc- 

 erine, after the sections have been stained with eosin and stood 

 for a few hours in glycerine. I did not find an authentic specimen 

 of P. pubera in Kew or Fries Herbaria but specimens received 

 under this name from Bresadola, Litschauer, Romell, and Miss 

 Wakefield have gloeocystidia in every specimen and other char- 

 acters as stated and show agreement in the European concept 

 of this species. Specimens with the other characters of P. pubera 

 but lacking gloeocystidia should be compared with P. guttulifera. 

 In North America, P. pubera forms thinner fructifications than 

 in Europe and is sometimes paler, drying rarely whitish or with 

 a slight yellowish tint. 



Specimens examined: 

 Sweden: Goteborg, L. Romell, 174- 

 Germany: Westphalia, Lengerich, W. Brinkmann, authentic 



specimen of P. pubera Fr. f. villosa from Bresadola. 

 Austria: Tirol, Innsbruck, V. Litschauer, two specimens; Stubai, 



V. Litschauer. 

 Italy : Trient, G. Bresadola. 

 Great Britain : S. Wales, Swansea, E. M. Wakefield (in Mo. Bot. 



Gard. Herb., 57123). 

 Canada: Quebec, Hull, J. Macoun, 888. 

 New Hampshire: Chocorua, W. G. Farlow, 6, 6b, 27, and 29 (in 



Burt Herb.), and an unnumbered specimen and 152 (in Mo. 



Bot. Gard. Herb., 7843, 55244). 

 Massachusetts: Magnolia, W. G. Farlow, two specimens. 

 Rhode Island: Woonsocket, W. H. Snell, 7M, 8M (in Mo. Bot. 



Gard. Herb., 56805, 56806). 



