112 MURRILL : POLYPORACEAE OF NoRTH AMERICA 



Hampshire (Miss Minns) and New York (Underwood). Klotsch's 

 collections from Scotland are Poly poms foincntarius L. of advanced 

 age and indurated. This is the conception of F. 7ugricans at 

 Berlin (see Sydow, Myc. Mar. No. 2604). At Kew, F. 7iigricans 

 has been considered " rare the world over." A tiny specimen 

 2X3X2 cm. in the herbarium of Berkeley sent from Upsala 

 presumably by Fries himself has the external appearance of F. 

 nigricans (see Fries, Icon. />/. 1S4), but its size would indicate that 

 it is Povia levigata Fries, in its pileate form, a state of this fungus 

 not known to Fries and easily confused with depauperate forms of 

 F. nigricans. The other specimens at Kew are all old hardened 

 forms of P. fomcntariiis L. 



2. Pyropolyporus fulvus (Scop.) 



Boletus fulvns Sco]p. Fl. Carn. Ed. 2. 2: 469. 1772. 



Polyporiis igniarius b. minor, subperpendicularis Fries, Syst. I : 

 375. 1821. 



Polyporiis fnlvus Fries, Hym. Eur. 559; Icon. pi. 184, f. j. 



Fames fulvus Gill. Champ. Fr. i : 687. 1878. 



Phellinus fulvus Quel. Ench. Fung. 172. 1886. 



Fries at first considered Boletus poniaceus Pers. synonymous 

 with B. fulvus Scop., but later decided, and correctly so, that it is 

 only a form of P. igniarius L. In Micheli's no. 9, p. 119, of his 

 genus Agaricuni, the two forms are confused, though his figure, 

 pi. 61, ordo II, doubtless represents P. fulvus growing on Primus 

 and not P. igniarius growing on Mains. This confusion still exists 

 in European herbaria and it is impossible to determine in them 

 what is meant by Poly poms fnlvus Fries. In the following descrip- 

 tion Scopoli very plainly characterizes the plant under discussion : 

 " Totus fulvus ; poris difformibus, non adeo profundis. Habitat 

 in cerasis recens detruncatis. Junior integerrimus, adultus vero 

 margine sinuatus. Fulvus color in margine et subtus evidentior. 

 Poruli obsoleti, totum fungum subtus non semper occupant." 



PI. Crypt. France par Desmazieres no. 5157. " Sur les pru- 

 niers et les cerisiers." Fung. Selec. Exsic. par Roumeguere No. 

 6963. " Forma Cerasi, sur un vieux cerisier." Trienti (Bresa- 

 dola) on Persica, Eisenach and Thuringen (Underwood) on Pru- 

 nus, Sweden (Murrill) on Primus, and on Pmnus both wild and 



