1915] 



OVERHOLTS STUDIES IN THE POLYPORACEAE 701 



According to the writer's notes on specimens of P. lacteus 

 in the herbarium of the New York Botanical Garden, that 

 species, as it appeared in the ' North American Flora,' is P. 

 albellus as here denned, at least in part. Neither can the 

 writer accept Eomell 's interpretation of P. lacteus, but if such 

 a plant exists it must agree in the main with Fries' descrip- 

 tion and figure, and neither of the above interpretations do 

 so agree. I do not know what Bresadola's latest ideas on the 

 subject are, but at one time he regarded P. lacteus and P. 

 chioneus as synonyms — a position just as untenable as that 

 taken by Murrill and Romell. 



According to the above interpretation of P. chioneus and 

 P. albellus, the presentation of the two species in a recent 

 paper 1 by the writer should be modified, and those collections 

 that show simple hyphae in the context should be referred to 

 P. albellus and those with branched hyphae should be referred 

 to P. chioneus. 



P. delectans and P. spumeus. — The first one of these species 

 was described by Peck, 2 in 1884, from specimens collected in 

 Ohio by Morgan. It is a large or medium-sized plant and was 

 described as having a fleshy-fibrous context, a glabrous or 

 fioccose-tomentose pileus, and long tubes with large unequal 

 mouths. By this last character and by the large size of the 

 plant and the ellipsoid or subglobose spores it is easily dis- 

 tinguished from the species discussed above. In size of pores 

 and length of tubes it is intermediate between the above 

 species and P. obtusus Berk. A much more closely related 

 species, however, is P. spumeus. The original notes of 

 Sowerby on this species are very meager. The plant is de- 

 scribed as " oozes from decaying elms in a very soft frothy 

 mass, hardening in a day or two; and if it dries favorably, 

 the pileus becomes hispid. The pores are small and nearly 

 round; the tubes not long." In Sowerby's text 3 this species 

 is followed by P. betulinus. Plates 211 and 212 are cited as 

 representing the two species, respectively. Plate 211 shows a 



1 loc. cit. p. 97. 



2 



S 



Bul. Tor. Bot. Club 11: p. 26. 1884. 



Colored Figs. Eng. Fung. pi. 211-212. 1797-1803. 



