56 [Assembly, 



determinate : verrucae minute, subdistant, at first a limpid globule 

 resting on the subiculum, then slightly prominent, papilliform, 

 colored like the subiculum and crowned with a limpid globule 

 which varies in color from hvaline to amber. 



Decorticated wood of poplar, Populus tremuloides. Elizabeth- 

 town. September. It forms patches several inches in extent. It 

 is apparently related to P. Friesii, but it is not membranous, the 

 warts are colored like the subiculum and are not immersed in ir. 



THELEPHORA DENDRITICA, Berk. 



Overspreading the hymenium of effete Polyjporas applanatus. 

 Adirondack mountains. September. 



STEREUM ABIETINTJM, Pers. 



Prostrate trunk of spruce, Abies nigra. Cascadeville, Adiron- 

 dack mountains. June. 



Our specimens agree with the description of the species to 

 which we have referred them, but they present some interesting 

 characters not mentioned in that description. It often happens 

 that great perplexity arises because of the incomplete descriptions 

 of some of the older authors. A careful examination of our speci- 

 mens shows the presence of both setse and metuloids, the latter 

 much more numerous than the former. Thus this species does for 

 Stereum, Hymenochsete and Peuiophora what Dcedalea confragosa 

 does for Dsedalea, Trametes and Lenzites, as was shown in the 

 thirtieth report. It sets at naught the characters used in dis- 

 tinguishing these genera, and bids defiance to the generic limits 

 assigned in the botanies. To the naked eye, the hymenium in our 

 specimens has a somewhat " velvety pruinose " appearance, but 

 when examined by the microscope it is found to be abundantly 

 furnished with projecting set i form bodies, some of which are 

 smooth and colored, as in Hymenochsete ; others are colorless and 

 rough or minutely warted, as in Peniophora. Sometimes a single 

 one is colorless and warted in the upper part, colored and smooth 

 in the lower. And as if this was not enough of confusion to our 

 former notions, the hymenium, though dry, becomes rimose as in 

 many species of Corticium. The fungus sometimes forms patches 

 several inches in extent by the confluence of individuals. It is 

 nearly or quite one line thick, the intermediate stratum being 



