384 



L., Schum. no 1955, O. F. MiiUer 67 2^^ Bcgesvampen (Miiller 63 ='), 

 Tander-Rerhat (Viborg 93 =«"), Tender- Poresvamp (H. 37 ^°^ R 69 ==), 

 Begens Fyrsvamp (R 02 a "^ c. icon., 04 a '^), Lit: R 80 a c. icon., 

 83 d 238 c. icon., 89 a ^ Sev. P. 95 '^ c. icon., Schum. 26 ^"^ 



Kylling reports it (1684) to have been found at Charlottenlund 

 indicated as: "a fungus used for tinder-boxes''; later on (1688''*) he 

 indicates it as "Fungus in caudicibo nascens unguis equini figura. On 

 old beeches''. 



Populus alba. F. Trolleborg. Alnus glutinosa. S. Dyrehaven. Ulmus. S. Hol- 

 steinborg (Oppermann see R 93 a '""^). Betula 6^ Fagus. Common. Aesculus 

 hippocastanum. S. Herlufsholm (Vind). 



Polyporus nigricans Fries S. M. I ^^^, Syll. VI ^8", Sort Poresvamp 

 (R 02 a "«). 



Rostrup considers Polyp, nigricans as an autonomous species which 

 was present on the trunks of Betula already in prehistoric times (R 

 83 d 2''^). Neger also considers it an autonomous species stating it 

 from Dynddalen. B. (Neger 06). I am inclined to consider all the 

 specimens of Polyp, nigricans I have seen to be old blackened spe- 

 cimens of Polyp, fomentarius on Betula which have been growing 

 in more dry localities. The Klotzschian Polyp, nigricans from Scot- 

 land, quoted by Fries in Hym. ^" is, according to Romell (11 ^') also 

 merely the old blackened state of Polyp, fomentarius (see also Schroeter 

 89 ''8«). 



1858. Polyporus igniarius Fries S. M. I "^ Syn: Fomes ign. Sacc. 

 Syll. VI "", Boletus ign. L., Schum. no 1954, Fl. D. tab. 953, Egesvamp 

 (Schum. 08^1), Kneske-Rarhat (Viborg 1793^^=, Schade 1811 ^«0. Hd- 

 Poresvamp (H. 37 ""^ R 69 =5), Tendersvamp (Schum. 08 ", R 02 a "' 

 6. 04 a «=). 



Rostrup has found it in several places in peat-bogs, and Sophus 

 Meller has found it among broken tools from the fireplaces of our 

 ancestors. Kylling mentions it (1688 "') as "Fungus cerasorum imbri- 

 catum. Fungus growing on old cherry-trees". 



It is a wound parasite attacking various trees. The wood of the 

 host becomes brown during the first stage of attack, and afterwards 

 white. This fungus and Polyp, fomentarius are limited each to its 

 special host-plants, and it is very rare that both should attack the 

 same species of trees (viz. Populus alba). I have never seen the pre- 

 sent species on Betula or on Fagus, and I must consider the state- 

 ments to this effects contained in the books to be based on a mistake. 

 The form of Polyp, igniarius to be found on Pomaceae has been 

 named Polyporus pomaceus Fries. 



Noticed on Salix alba, fiagilis, caprea, pentandra, Populus alba, tremula. 



