68 STATE HOKTICULTUEAL SOCIETY 



839. D. ambigua, Berkeley. 



On maple trunks, not common. 



Tkametes. 



840. T. serpens, Fries. 



Not infrequently on elm logs, especially those dry and 

 decorticate. 



841. T. scutellata, Schweinitz. 

 Eare. 



842. T. pini, Fries. 



On the wood of coniferous trees. 



843. T. peckii, Kalchbrenner. 



Rather common; chiefly on stumps of cottonwood and 

 maple. 



844. T. suaveoleus, Fries. 

 On decaying wood. 



845. T. sepium, Berk. 

 On stumps. 



Poria. 



846. P. xantholoma, Schweinitz. 

 Not common. 



847. P. salmonicolor, Berkeley and Cooke. 

 On charred surface of wood. 



848. P. barbaeformis, Berkeley and Cooke. 



849. P. vaporaria, Fries. 



On rotting wood of many sorts, in lumber piles, and 

 even on heaps of rotting leaves. 



850. P. rufa, Schrader. 



Rare on rotten sap-wood of various sorts. 



851. P. vincta, Berkeley. 



852. P. obducens, Persoon. 



Not common. Found occasionally on old oak rails, 

 where specimens may persist several years, adding 

 stratum after stratum of minute spores. 



853. P. mollusca, Fries. 



Rather common on rotten wood, especially on willows. 



