78 NEW YORK STATE MUSEUM 



mycelium or forming a somewhat reticulated fimbriate membrane; 

 pores minute, subrotund, equal, whitish inclining to cream color. 



Under side of prostrate trunks of maple, forming extensive 

 patches on the wood and bark. Osceola. Aug. 



By its rhizomorphoid mycelium this species is related to P r i a 

 V a i 1 1 a n t i i , but the pores are smaller and not collected in heaps 

 as in that species. By reason of its tenacious substance it is 

 readily separable even from an irregular matrix. 



Notes. With this species a question arises as to what shall be 

 considered the type material. The herbarium sheet contains what 

 are undoubtedly parts of two separate collections, and there is some 

 doubt as to the identity of the two collections. One set of speci- 

 mens (plate 22, figure 6) has nearly entire tube mouths and few 

 mycelial strands and is undoubtedly from the type collection. The 

 other set of specimens (plate 4. figure 3) has a more lacerated 

 hymenium and better developed mycelial strands. When touched 

 with a drop of KOH solution the former at once becomes black 

 while the latter does not change color. There is also in the her- 

 barium a collection in a small box that agrees exactly with the 

 second set of specimens on the herbarium sheet, and undoubtedly 

 those specimens were taken from this box (or collection) and 

 mounted on the sheet. This collection, according to the label on 

 the box, was made at Ampersand pond by Peck in September, and 

 was taken from a maple substratum. The first collection is from 

 Osceola and also on the prostrate trunk of maple. Undoubtedly 

 the Osceola specimens are the types and are so regarded here. In 

 internal structure the two collections are alike. The only differences 

 in external appearance are the more lacerated hymenium, better 

 development of mycelial strands, and the lack of color change in 

 KOH for the Ampersand collection. 



The specimens are rather irregular in shape and vary in size from 

 1.5 to 7 cm broad and 6 to 15 cm long. The color of the hymenial 

 surface varies from cinnamon buff to warm buff or somewhat 

 light ochraceous buff. Sometimes a very narrow, white, subfim- 

 briate margin is present, but more often the entire margin is fertile. 

 In either case .small white rhizomorphic strands less than one- 

 fourth of a millimeter in diameter may be present, but in some speci- 

 mens they are absent. The thickness of the hymenium-producing 

 portion varies up to 2 mm. Of this practically all is tube length, as 

 the white subiculum is extremely thin. The mouths of the tubes 

 when entire are more or less angular, and average 4 to 5 to a milli- 

 meter. The dissepiments are rather thin and. esoecially in one set 



