36 



Mycologia 



176. Porta betulina Murrill. On fallen Betula populifolia. Crawford Notch, 



Nos. 4565 and 5013 ; on Betula alba, No. 5025. This species has been 

 extensively studied by the writer and will be considered more in detail 

 in a paper soon to be published. It is common throughout the north- 

 eastern states, but without knowing the host it is difficult to distinguish 

 from resupinate forms of Fomes igniarius. The spores were originally 

 described as " ovoid, smooth, fulvous, 4-5 fi long.'' They are, how- 

 ever, subglobose, smooth, hyaline, and measure 5-6 fi in diameter. The 

 species is consequently misplaced in Murrill's genus Fomitiporella, in 

 which the brown spores are made a generic character. 



177. Porta ferrtiginosa (Schrad.) Fr. On dead limbs of Acer. North Con- 



way, No. 4672; on fallen Prunus serotinus, Crawford Notch, No. 4971; 

 on dead Fagus, Willey Station, No. 5096. Among other brown resupi- 

 nate species this one is well characterized by the abundant setae, the 

 distinctly oblong or oblong-ellipsoid hyaline spores measuring 4-5 

 X 2-2.5 Mi an d by being confined to the wood of deciduous trees. 



178. Poria fimbriata Pers. On rotten wood. North Conway, No. 4607. The 



species is sometimes known as Porothelium fimbriatum. 



179. Poria medulla-pants Pers. On old limbs of deciduous trees. North 



Conway, No. 5035. 



180. Poria nigrescens Bres. On rotten Betula. North Conway, No. 4942. 



181. Poria prunicola Murrill. On dead Prunus. Crawford Notch, No. 4580. 



This is a rather common Poria on dead Prunus, especially at the higher 

 elevations in the vicinity of Crawford Notch. Its affinities are with 

 Poria betulina. Setae are rare, but usually present. 



182. Poria subacida Peck. On fallen Acer rubrunt. Intervale, No. 4641 ; on 



fallen hemlock, North Conway, Nos. 4827 and 5046; on fallen Abies 

 balsamea, Intervale, No. 4974 ; on dead Betula, North Conway, No. 

 5049 ; on log of Pinus Strobus, North Conway, No. 5097. A common 

 and variable species. 



183. Poria tsugina Murrill. On log of Tsuga canadensis. North Conway and 



Lisbon, Nos. 4962 and 5091 respectively. 



184. Trametes carneaNees. On log of Picea mariana and on pine log. North 



Conway, Nos. 4731 and 4933 respectively. 



185. Trametes heteromorpha Fr. On fallen Abies balsamea. Crawford Notch, 



No. 5045. This species has only recently been recognized in this coun- 

 try (see Overholts, Polyporaceae of the Middle-Western United States, 

 p. 74. 1915). Its occurrence in such widely separated localities as 

 Idaho and New Hampshire argues for a wide distribution. 



186. Trametes malicola B. & C. ? On rotten log of hemlock or red spruce. 



North Conway, No. 5100. The specimens may belong rather under 

 Fomes annosus. More recent studies indicate that the real affinities of 

 this species are with Fomes annosus under which it is now included 

 as a weathered form. 



187. Trametes mollis Sommerf. On fallen Acer. Crawford Notch, No. 4608, 



collected by Dr. H. H. York and Mr. L. E. Newman ; on fallen Fagus 

 and Acer, Crawford Notch, No. 5129. 



188. Trametes peckii Kalchbr. On log of Populus grandidentata Dundee, 



No. 5047. 



