636 



beus. I know no other Pol. acidiiliis and no other Pol. trabeus 

 than this.^) At all events it must be identical with Pol. träbens of 

 Lund (Consp. Hym. p. 91 1 which is said to be »vulgaris» at Stock- 

 holm. Pol trabeus Rostk. seems to be another species, however^ 

 as far as can be judged from bis figure. 



Polyporus albus. 



In September 1896 I detected a white and soft fleshy-fibrous 

 Polyporiis in a cavity of a living old tree of Fraxinus excelsior in 

 the avenue (»allé ) at the manor-seat Sandemar about 30 km. south- 

 east from Stockholm. In April 1904 I sent a sample of it to 

 Bresadola, and he informed me that it is identical with the spe- 

 cies which he means under the name Pol. riibiginosiis in Hj-^m. 

 Hung. p. 8 (72) and also identical with Pol. albiis in his Fungi 

 Pol. p. 73. In last August my son brought me two specimens of 

 a large white Polyporiis from a living tree of Populiis tremula on 

 an island called Asken in the archipelago of Stockholm. As I 

 suspected identity with the Sandemar species I went to look for 

 the latter again but was sorry to find that the tree had been taken 

 away in the meantime. 



As to the name question of this Polyporiis it can not be referred 

 to Pol. riibiginosus as the authentic specimen of the latter in Kew 

 Herb. seems to be identical with Pol. leporinus which is a quite 

 different plant. I strongly doubt that it can be Fries' Pol. albus 

 either, as Fries compares his plant with Pol. salignus and cites 

 BuLL. t. 433. f 1. with which my plant bas no resemblance. The 

 surface is not »glabratus», but »villoso-scruposus» as in Pol. epi- 

 leuciis. I therefore would rather refer my plant to this last named 

 species (which is unknown to me), if the description did not dis- 

 agree in other points. The flesh is fibrous (not »caseosus») and 

 the pores are white only on fresh specimens. When drying, the 

 pores become at first rose-pink or incarnate and lastlj-^ sordid or 

 subfuscous. It does not agree either with Fl. Dan. t. 1794 cited 

 by Fries. Being thus unable to identify it with any of the spe- 

 cies described I venture to considei it a ^new species» and will 



^) In November 1896 I found a species with rather thin sericeous pilei growing 

 »imbricato-mnltiplex?' in a resiniferous wound on a living spruce near Stockholm. 

 Bresadola has referred this collection to Fol. trabeus, but I am unable to agree 

 with him in this instance. The species must be very rare and seems to be unde- 

 scribed, but as I have no photo of it I will defer the naming of it to another time. 

 The spores are allantoid, 6 x 1 u. 



