94 



NEW YORK STATE MUSEUM 



On bark and decorticated wood of spruce. 



Type locality: Sevey, N. Y. C. H. Peck. Not otherwise known 

 to the writer. 



Poria myceliosa Peck 



Plate 10, figure S. plate ii 



N. Y. State Mus. Bui. 54, P- 952. 1902 

 Original description. Subiculum membranaceous, separable from 

 the matrix, connected with white branching strands of mycelium 

 which permeate the soft decayed wood, or with radiating ribs which 

 run through the broad sterile fimbriate white margin ; pores very 

 short, subrotund angular or subflexuous, the dissepiments thm, 

 acute, dentate or slightly lacerate, pale yellow ; spores minute, sub- 

 globose, .0008-.00012 of an inch broad. Round Lake, Saratoga 



CO. August. 



This fungus forms patches several inches in extent on much 

 decayed wood of hemlock. It follows the inequalities of the sur- 

 face on which it grows. It is scarcely more than half a line thick. 

 The pores develop from the center toward the margin and at first 

 are mere concavities in the subiculum. The species is apparently 

 related to P. tenuis Schw., from which it differs in habitat, 

 color and the prominent mycelial strands. In this last character 

 • it bears some resemblance to P. v a i 1 1 a n t i i (DC) Fr. 



Notes. The type collection contains abundant material in various 

 stages of development. The largest specimen is about 8 cm broad 

 and 12 cm long, and the smallest about 2 cm in diameter. The 

 color of the hymenial surface is now nearly cinnamon buff in the 

 more mature specimens and a lighter color near pinkish buff in 

 younger specimens. The species grows widely effused and has a 

 white or whitish sterile border that varies in width up to 15 mm. 

 This border is characteristically fimbriate and from it strands of 

 white mvcelium sometimes radiate outward and downward into 

 the substratum (plate 12, figure i). The largest of these strands 

 are about half a millimeter in diameter but those on the surface of 

 the substratum are much smaller and in some specimens they are 

 entirely lacking. The thickness of the hymenium-producing por- 

 tion is usually less than one-half of a millimeter and never reaches 

 a millimeter.' Of this thickness practically all represents the length 

 of the tubes, as the subiculum on these portions is extremely thin 

 but quite conspicuous. The mouths of the tubes -are decidedly 

 angular in outline and vary in diameter from i to 4 to a millimeter, 



