1915] 



BURT THELEPHORACEAE OF NORTH AMERICA. V 755 



C. G, Lloyd, 4198; Loveland, D. L. James (in U. S. Dept. 

 Agr. Herb.). 



Wisconsin: Blue Mounds, E. T. and S. A. Harper, 864, 879, 

 880; Madison, W, Trelease (in Mo. Bot. Gard. Herb., 5145, 

 44779) ; C. J. Humphrey, 2146 (in Mo. Bot. Gard. Herb., 

 44784). 



Illinois: Kiverside, E, T. and S. A, Harper, 698, 

 Missouri: Creve Coeur, E, A, Burt (in Mo. Bot. Gard. Herb., 

 44763). 



2. S. deglubens (Berk. & Curtis) Burt, n. comb. 



Corticium degluhens Berk. & Curtis, Grevillea 1 : 166. 1873. 



Type : type and cotype in Kew Herb, and Curtis Herb. 



Fructification resupinate, effused, coriaceous, separable, 

 white beneath, drying about cacao-brown, the margin very 

 narrow, white, byssoid, soon detached; structure in section 

 250-300 n thick, (1) with a very loosely interwoven layer 180- 

 200 /i thick, having hyphae 1^2 /x in diameter which branch 

 and form (2) a very densely interwoven layer 80 /n thick with 

 the basidia in the upper 30 jli, not quite reaching to the sur- 

 face, among the very fine, densely interwoven filaments from 

 the subhymenium ; basidia longitudinally septate, 15 X 10-12 

 H'y spores colorless, simple, even, flattened on one side, 

 6-7 X 4i-5 II, 



On juniper, Alabama. 



This fungus has the same type of structure which is found 

 in resupinate specimens of Sebacina incrustans. It differs 

 from the latter in having the hymenium darker, all the spores 

 found in a sectional preparation a little smaller, and the 

 hyphae of the layer next to the substratum a little smaller 

 and more flaccid than those of S. incrustans, and the margin 

 was described as soon detached. These differences may be 

 merely the variation from specific type of a single collection, 

 or they may be those of a subspecies of S, incrustans which 

 has taken on the saprophytic life on dead wood, prevalent for 

 most species of Sehacina. Until other collections, referable to 

 8. degluhens are made, the former view appears the more 

 probable. 



