Murrill: Polyporaceae of North America 339 



figured under several genera since it was first described as a 

 Boletus. Soon after being transferred to Polyporus, it was assigned 

 to Daedalea because of its irregular pores, then to Polystictus 

 because it seemed nearly allied to P. perennis. Quelet, however, 

 overlooked this relationship and classified it under Cladomeris 

 with Poly poms frondosus, P. imbcrbis, etc., largely on account of 

 its hyaline spores. The species may be easily confused in some 

 of its forms with Polyporus hispidus, but its normal form is stipi- 

 tate, while P. hispidus is always dimidiate and the spores of the 

 former are hyaline while those of the latter are of a deep golden 

 hue. From the genus Coltricia, apparently its nearest ally, it 

 differs in having hyaline spores, a more spongy context, differently 

 colored tubes and a very variable stipe. 



I take pleasure in dedicating this genus to my friend Lars 

 Romell, the distinguished mycologist of Stockholm, Sweden. 



Romellia sistotremoides (Alb. & Schw.) 



Boletus sistotremoides Alb. & Schw. Conspec. Fung. 243. 1805. 

 Polyporus Schweinitzii Fr. Syst. Myc. 1: 351. 1821. Icon. pi. 



i79- /• 3- l8 70. 

 Daedalea epigaea Lenz, Schwam. 62. 1831. 



Polyporus tabulaeformis Berk. Lond. Jour. Bot. 4: 302. 1845. 



Polyporus spectabilis Fr. Nov. Symb. 48. 185 I. 



Polyporus hispidioides Peck, Rept. N. Y. State Mus. Nat. Hist. 



33 : 21. 1880. 

 Polystictus Schweinitzii Karst. Rev. Myc. 3 : 18. 1881. 

 Cladomeris Schweinitzii Quel. Enchiridion, 169. 1886. 



The description of this fungus as given by the original authors 

 is sufficiently clear and complete and the plant is so well known 

 as to require little comment upon its appearance and structure. 

 On account of its exceeding variability, well-known mycologists, 

 such as Fries, Berkeley and Peck, have been led to rename it in 

 certain of its forms. P. tabulaeformis, for example, is an old plant 

 of P. Schweinitzii from Augusta, Georgia, sent to Berkeley by 

 Wray, while a similar specimen sent by Curtis from North Caro- 

 lina to Fries received the name P. spectabilis, the type of which 

 still exists at Upsala. Fries was deceived by the firm, corky sub- 

 stance and very changed aspect of the plant in its older stages. 



