472 Murrill: Polyporaceae of North America 



page from plants collected by Curtis high up on the trunk of a 

 living oak in North Carolina. The distinct zones on the context 

 appear to accompany luxuriant growth, being present in very large 

 plants known by Berkeley as /. crassus. 



This species is often met with upon decaying wood of oak, 

 locust, apple and various other deciduous trees throughout tem- 

 perate North America. 



New York, Cook; New Jersey, Ellis; Virginia, Murrill; 

 Georgia, Harper; Florida, Calkins, Lloyd; Ohio, Morgan ; Mich- 

 igan, Pieters. 



Irpiciporus Tulipiferae (Schw.) 



Boletus Tulipiferae Schw. Syn. Fung. Car. 73. 18 18. 

 Irpex Tulipiferae Fr. Fpicr. 523. 1838. 



Described from Schweinitz' Carolina collections on dead trunks 

 of Liriodendron, as follows : 



" B. P. maxima effusa margine involuto tenui albida, poris 

 maximis acutis prominulis asperis irregularibus." 



This species is considered by many the same as I. sinuosus Fr. 

 (Elench. Fung. 145. 1828), described from specimens observed 

 for several years on fallen oak branches in Sweden and others sent 

 from Ruthenia by Weinmann. Bresadola goes further and adds 

 I. laeteus Fr., /. canescens Fr. and /. Bresadolae Schulz. to the list 

 of synonyms. In any case, Schweinitz' name is the oldest. 



This is one of the commonest fungi in our woods, the thin 

 effused pilei often extending the whole length of branches, and 

 even entire trunks, of dead deciduous trees of all kinds. A few 

 collections are as follows : 



Canada, Macoun ; New York, Peck, Shear, Britton ; Pennsyl- 

 vania, Sumstine, Murrill ; New Jersey, Ellis, Britton, Murrill ; 

 Virginia, Murrill ; Tennessee, Murrill ; Ohio, Selby, Morgan; 

 Missouri, Demetrio ; Kansas, Bartholomew; Wisconsin, Baker; 

 Mexico, Egeling. 



Species inquirendae 



Irpex pallescens Fr. Epicr. 522. 1838. Described from 

 plants collected by Schweinitz in North America on trunks of 

 Liriodendron. 



