[Vol. 11 

 20 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



to the fructifications and at the apex of the fructifications are 

 often rough- walled near their tips; hymenium paler, urceolate, 

 the margin incurved; basidia simple, with 4 sterigmata; spores 

 hyaline, even, cylindric, curved, 6-11 X 1K~43^ n.. 



Fructifications in dried condition 3^-1 mm. high, 200-300 p 

 in diameter, where crowded 3-4 to a mm. 



Usually crowded into small areas on pustules or crevices in the 

 bark of dead twigs of Alnus, Prunus, Quercus, Betula, Salix, etc., 

 or covering broad areas of decorticated wood, fewer and more 

 scattered when the wood is very rotten. Throughout Europe, 

 Newfoundland to Louisiana, westward to Oregon and British 

 Columbia, and in Porto Rico. August to May. Common. 



European specimens of >S. anomala in the exsiccati cited below 

 have somewhat larger spores than those of gatherings from 

 eastern United States but do not differ at all from those of the 

 extreme West. Those from British Columbia have spores 7-10 X 

 4-4J^ [x and hairs rough near the tips, agreeing in both respects 

 with the Westendorp distribution from Belgium. In one Colo- 

 rado and one Montana gathering the spores are 3 {a thick, as in 

 those of the Berkeley and the Libert distributions, and in another 

 Colorado specimen 3-33^ \i thick as in the Cavara distribution. 

 They are 2J^ \i thick in two Montana gatherings and in the 

 Rabenhorst distribution, although many of the latter are only 

 2 \k thick as is the usual thickness of spores of New York and 

 New England gatherings. In my opinion these spore differences 

 do not warrant specific distinction, and I doubt furthermore 

 whether S. confusa of Europe, separated from S. anomala on the 

 sole ground of spores 7-10 X 2-2J^ ja, is really distinct from the 

 latter. The distributions by Berkeley, Libert, and Cavara are 

 true intermediates. 



Specimens examined: 

 Exsiccati: Bartholomew, Fungi Col., 2085, under the name S. 



ochracea; Berkeley, Brit. Fungi, 260; Cavara, Fungi Longo- 



bardiae, 108; Cooke, Fungi Brit., 405, under the name S. 



ochracea; Desmazieres, Crypt. France, 1059; Ellis, N. Am. 



Fungi, 611, under the name S. ochracea; Reliquiae Farlowianae, 



363; Karsten, Fungi Fenniae Exs., 7; Kunze, Fungi Sel. Exs., 



301; Libert, PL Crypt. Arduennae, 227; Rabenhorst, Herb. 



