Murrill: Light-Colored Resupinate Polypores 91 



narrow and practically disappearing with age, but at times rather 

 thick and felty, reaching 5 mm. broad; context very thin, white, 

 inconspicuous with age; hymenium very even, continuous, glisten- 

 ing, white or tinged with yellow, often showing brownish stains 

 in dried specimens where touched with the fingers or near the 

 margin where the tubes are young ; tubes annual, large, rigid, 1-3 

 mm. long, rounded or somewhat angular, entire, 2-3 to a mm. ; 

 spores copious, narrowly-ellipsoid, often slightly curved and 

 apiculate at the base, smooth, hyaline, 5-6 X 3 



Type collected on a decorticated log of Pinus monticola at 

 Priest River, Idaho, /. R. Weir 61. Also on the same host in 

 the same locality, /. R. Weir 57, 72, 77; on dead wood of Pinus 

 monticola at Agassiz, British Columbia, /. R. Weir 65; and on 

 dead wood of Picea Engelmanni, probably from Priest River, 

 Idaho, /. R. Weir 63. All of these specimens are very uniform 

 in appearance and represent the species in excellent fashion. 



25. Poria lacerata sp. nov. 



Effused for several centimeters, continuous, inseparable, thin ; 

 margin cottony or felty, appressed, milk-white, unchanging, 

 narrow, practically disappearing with age ; context a mere white 

 membrane ; hymenium even, continuous, milk-white, staining 

 yellowish-brown where bruised in handling; tubes rather long, 

 delicate, thin-walled, angular, becoming fimbriate-lacerate at ma- 

 turity, 2 mm. long, about 3 to a mm. ; spores copious, ellipsoid, 

 smooth, hyaline, usually uniguttulate, 6X3-5/*. 



Type collected on a well-rotted, decorticated log of Quercus 

 alba near Womble, Arkansas, November 7, 191 5, W. H. Long 

 J 9777- Described from a good specimen sent me by Professor 

 Long, who refers to another number collected by him which I 

 have not seen. 



26. Poria rimosa sp. nov. 



Effused for a few centimeters but interrupted by the irregu- 

 larities of the substratum, inseparable, thin ; margin very thin, 

 membranous, milk-white and unchanging in the early stages, be- 

 coming cremeous and more felty when older, always appressed ; 

 context white, inconspicuous in age; hymenium appearing in 

 patches, at length continuous, but soon cracking transversely 

 every few millimeters, white with a cremeous tint to dull-creme- 

 ous ; tubes about 1 mm. long, oblique, thin-walled, angular, entire, 



