76 NEW YORK STATE MUSEUM 



and shape. They project conspicuously from between the basidia. 

 Usually the apex is more or less pointed and they are largest at or 

 just above the center. A peculiar feature of these structures is 

 that they are apparently formed by several hyphal fusions. In 

 crushed preparations of the hymenium as many as five or six hyphae 

 go oflf from the base of these bodies (plate 3, figure 3). More 

 rarely they appear to be the enlarged end of a single normal hypha. 

 The tramal and subiculum hyphae are rather compactly arranged, 

 are colorless, 2 to 3 /x in diameter, and with clamp connections and 

 cross walls (plate 3, figure 4). The clamps are of a more semi- 

 circular outline than those of most species of fungi. On account of 

 the small size of the hyphae they are somewhat difficult to locate at 

 first. The size of the hyphae and the presence of connections, are 

 other important points separating the specimens on Acer (types) 

 from those on pine bark. 



The affinities of the species are not clear. The general appearance 

 is somewhat that of forms of Poria subacida or related 

 species, but it differs in the more yellow color when fresh, the 

 different spores, the presence of conspicuous cystidia, the diameter 

 of the hyphae, the presence of clamp connections, etc. It probably 

 belongs to a different group of species. In the several hundred 

 collections of Poria thus far examined by the writer, none with this 

 combination of characters has been found. 



Not much can be stated regarding the decay produced by this 

 species. The Acer substratum has been reduced to a friable cinna- 

 mon-colored mass that readily breaks up into small flakes. The 

 decay in the coniferous substratum is more brown in color and can 

 be powdered more easily. 



Redescription. Annual, effused up to lengths of 10 cm or more, 

 separable when fresh (fide Peck), with a fimbriate, byssoid margin 

 (fide Peck.) when young, this more or less disappearing in mature 

 specimens, greenish yellow in color (fide Peck) ; subiculum thin 

 and subgelatinous (fide Peck) in fresh specimens, practically obso- 

 lete when dry; tubes 2 to 5 mm long, their mouths golden yellow 

 (fide Peck) when fresh, between cartridge-buff and honey yellow 

 in herbarium specimens, angular when mature, thin-walled, entire, 

 averaging 2.5 to 5 to a millimeter ; spores oblong or short cylindric, 

 rounded at apex, obliquely apiculate at base, smooth, hyaline 5.5 to 

 7.5 X 2.5 to 3.5 ix; basidia 3 to 4.5 fx in diameter; hyphae hyaline, 

 branched, 2 to 3 ft in diameter; clamp connections and cross walls 

 present. 



