553 White : Mt. Desert Fungi 



Family Hydnaceae. 



* Hydnum albonigrum Peck. Found only in one locality. 



* Hydnum boreale Banker, sp. nov. Plant white to greenish, 

 moist; pileus thick, convex, undulate, 12-15 cm. wide; stem 

 short, thick, flattened, the longer diameter three times the shortest 

 (2 cm. by 7 cm.), 7 cm. long; teeth short, 5 mm. long, 0.5 mm. 

 wide, the points rounded and somewhat knobbed when dry, decur- 

 rent, brownish with white tips ; substance zonate within, the upper- 

 most layer white spongy thick, the lower strata becoming darker, 

 harder, and more compact, in the stem deep lavender color ; my- 

 celium purple, persistent ; odor unpleasant. 



In damp rich soil and leaf mould. 



Hydnum carbunculus Seer. [= H. fcrrugineuin Fr.) The 

 peppery taste of this species has not been previously noted and is 

 an important character. 



* Hydnum humidum Banker, sp. nov. Plant yellowish, be- 

 coming brown, hygrophanous, pileus irregular, spongy, scrobicu- 

 late, 9 cm. or more wide, stem stout, brownish, about 2 cm. long, 

 1.5 cm. thick ; teeth long, 5 mm., brownish with white tips ; sub- 

 stance corky, hard when dry and gray like weathered wood but 

 with streaks and spots that appear darker and cartilaginous, which 

 cut as if gummy, zonate internally ; odor strong but not unpleas- 

 ant ; taste mild. 



In hard-packed wooded path. The fresh plant exudes water 

 freely when pressed between the fingers. 

 Hydnum repandum L. Fairly common. 



* Hydnum scrobiculatum Fr. 

 Hydnum zonatum Batch. 



Family Polyporaceae. 

 Daedalea confragosa polyporoidea Peck. Plentiful. 

 Favolus alveolarius (DC.) Quel. Fairly abundant. 

 PoLYPORUS adustus (Willd.) Fr. 



* PoLYPORUS CARPI neus Sower, 



POLYPORUS CARNEUS NcCS. 

 PoLYPORUS CHIONEUS Fr. 

 PoLYPORUS CONNATUS Wcin. 



* POLYPORUS coNFLUENS (A. & S.) Fr. Plentiful. 

 PoLYPORUS ELEGANS (Bull.) Fr. Fairly abundant. 

 PoLYPORUS fomentarius (L.) Fr. 



