1918] 



BURT THELEPHORACEAE OF NORTH AMERICA. X 365 



minate ; in structure 30-75 fj, thick, composed of a setigerous 

 layer of densely interwoven hyphae 1^ fx in diameter and of 

 very numerous setae uniformly distributed from substratum 



to hymenium, 36-45x5-7 /x, protruding up 

 to 30 II, tapering upward, and terminating 

 in slender, somewhat curved, very sharp 

 Fig. 31 tips ; spores in spore collection white, even, 



H. tenuis. flattened on one side, 4^-5^x2-24 /x. 



Section X68. From \J ^^^ ^r 



type. J^ ructmcations ^-l^Xi cm., finally con- 



fluent over areas up to 7x2-2 J cm. 



On bark and decorticated wood of fallen limbs of Thuja, 

 Tsuga, and Sahal. Vermont to Florida and in British 

 Columbia. August to June. Rare. 



H. tenuis belongs in the group of species with H. corrugata 

 and H, episphaeria, from which it differs by occurrence on co- 

 niferous substratum, raw umber color, and smaller setae 

 and the spores. The cracking of the fructification tends 

 toward rectangular areas, as in H. spreta, rather than to 5- 

 or 6-sided polygons, characteristic of H. corrugata. 



Specimens examined: 

 Vermont: Ripton, E, A. Burt. 

 New York: Altamont, E. A. Burt; Adirondack Mts., C. H. 



Peek J type (in N. Y. State Mus. Herb.). 

 Pennsylvania: Belief onte, L. 0. OverholtSf 3730 (in Mo. Bot. 



Gard. Herb., 55095). 

 Florida: Green Cove Springs, Br. Martin (in Ellis Coll. of 



N. Y. Bot. Gard. Herb., and in Mo. Bot. Gard. Herb., 55004). 

 British Columbia: Kootenai Mts., near Salmo, J. R. Weir, 499 



(in Mo. Bot. Gard. Herb., 3916). 



36. H. fuliginosa (Pers.) Bresadola,i Ann. Myc. 1 : 93. 

 1903. 



ThelepJiora fuliginosa Persoon, Myc. Eur. 1 : 145. 1822. 

 Stereum fuliginosum (Pers.) Fries, Epicr. 554. 1838; Hym. 



^ Bresadola states^, loc. cit., that H. fuliginosa as understood by him is not H. 

 fuliginosa (Pers.) L6v., although both give the same synonymy with the name. 

 Lveill6's combination has priority if both authors refer to the same species and 

 it precludes Bresadola's later use of this name for a different species: hence, if, 

 as Bresadola states, H. fuliginosa sensu L4veill6 is distinct from H. fuliginosa 

 sensu Bresadola, then Hymenochaete fusca Karsten is the name which should 

 stand instead of the combination by Bresadola. 



