[Vol. 2, 1915] 



766 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



50-160 y. thick, with even-walled hyphae 3 n in diameter, 

 densely interwoven next to the substratum, then curving out- 

 ward to form a hymenial layer 50-90 y. thick, consisting of 



erect, parallel, rod-like paraphyses 2 /x in diam- 

 eter and of basidia about 30 n below the surface 

 of the hymenium ; basidia longitudinally septate, 

 pyriform, about 18 X 12 n; spores colorless, 



simple, somewhat flattened on one side, 8-10 X 

 6-7 ix. 



Fructifications 2| cm. long, 1^ cm. broad. 



On very rotten coniferous and frondose wood. 

 New Hampshire and Massachusetts. May. 



When bits of dried specimens of this species 

 are moistened, they become softer and more gela- 

 tinous than is usual with those of other species 

 of the genus, but walls of the hyphae do not show 

 gelatinous modification in sectional preparations. 

 The paraphyses are as noteworthy as those of 

 Sebacina Helvelloides, being arranged close to- 

 gether side by side in a palisade layer. They are 



sometimes simple rods, sometimes divided into equal branches 

 which rise side by side to the surface of the hymenium. 



Specimens examined: 

 New Hampshire: Chocorua, W. G. Farlow, two collections (of 



which No. a is in Mo. Bot. Gard. Herb., 44782). 

 Massachusetts : Magnolia, W. G. Farlow, type. 



(To be continued.) 



Fig. 7 



S. atrata. 



Paraphysis, 



basidia X^O. 



