[Vol. 2 



764 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



shaped paraphyses with brown branches of zigzag form, which 

 rise 45-60 ju above the basidia and give the characteristic color 

 of the hymenium ; basidia 15-20 X 9-11 M, longitudinal septa- 

 tion not positively made out ; no spores found ; paraphyses 75 



l*-2 u in diameter. sweeD of branched top about 



trunk 



20 



Fructification 4 cm. long, 1 cm. broad. 



On limbs of dead Magnolia glauca. Maryland. December. 



It is not certain that this fungus is a Sebacina, for none of 

 its basidium-like organs show longitudinal septa, although in 

 a very few there is arrangement of the protoplasm suggestive 

 of such septation. The specimen is a little too immature for 

 generic reference but is probably a young Sebacina in my 

 opinion. The species is distinct from others in possible 

 genera by cinnamon-brown color, paraphyses scattered as to 

 trunks but with such brown, bushy-branched tops as to form 

 a compact surface of the color stated. 



Specimens examined: 

 Maryland : Takoma Park, C. L. Shear, 1339, type. 



12. S. adusta Burt, n. sp. Plate 27, fig. 19. 



Type: in Burt Herb. 



Fructification broadly effused, coriaceous, separable from 

 the substratum, Hay's brown when moist, 

 drying fuscous, the margin pale cartridge- 

 buff, fibrillose-fimbriate ; structure in section, 

 500-600 ii thick, composed of densely inter- 

 woven and obliquely ascending hyphae 3 n in 

 diameter, the walls not gelatinously modified, 

 which bear the basidia at the surface of the 



menmm 



basidia longitudinally septate, Q f ' . 



S. adusta. 



r riform, 12-16 X 8-10 /x ; spores colorless, Basidia and 



nple, curved, 10-12 X 4-5 M . hyphas X 540. 



Fructification 12 cm. long, 4 cm. broad. 

 On decorticated trunk of Populus trichocarpa. Idaho. July 

 September. 



In the single collection of this species which has been re- 

 ived the margin is everywhere closely applied to the sub- 

 ratum and shows no tendency towards becoming free or 



