150 YORKSHIRE NATURALISTS UNION. 



1030. Polypopus mollis Fr. 



N.E. — Scarboro'. On dead pine trunks. 

 S.W.— Potridings Wood (F.F., '01). 



1031. Polyporus clestpuctor Fr. 

 N.E.— Scarboro' (' Nat.' Jy. '81). 



S.W. — On timber, Liversedge railway station (Nat. Sep. '91). 



S.E.— Escrick (F.F., '96). 



On worked wood, which it destroys by causing it to rot 

 and crumble in the same manner as when attacked by " dry 

 rot " = Merii!iiis lacrymans. 



1032. Polyporus betulinus (Bull.) Fr. 



S.W. — On birch trees in Shackleton Wood near Hepton- 

 stall (Bolton, Tab. 159). Only too common on birch trees. 

 Distribution general. On living birch, which it finally kills. 

 A wound parasite, gaining an entrance through wounds made 

 by insects, broken branches, etc. When once in the trunk the 

 mycelium of the fungus spreads rapidly and the sporophores, 

 often in considerable numbers, burst through the bark and 

 develope on the surface. 



1033. Polypopus fumosus Fr. 



S.W. — Edlington wood (h\F., '91). North Dean Wood 

 (Nat. Sep. '92). Hebden Bridge (Fl. Hx), Goitstock. 

 Ravensthorpe (H. Parkinson) On fallen trunks. 



N.E. — Castle Howard (F.F., '92). Scarboro', on dead 

 stumps. 



N.W.— Masham (' Nat. ' Jan. '02). 



1034. Polyporus adustus Fr. 



Mid W.— Studley Koyal (F.F., '81). Boston Spa (Tr. ix). 

 Bolton Woods (Lees' FL). Bramham ; I larewood (F.F., '88). 

 Ling Ghyll (Nat. May '91). 



N.E. — Scarboro'. Castle Ploward (F.F., '92). Helmsley 

 (F.F., '03). 



S.W.— Ovenden (' Nat.' Sep. '92). Notton (F.F., '97). 

 Fixby (Fl. Hx.). Campsall (F.F., '99). WharnclifTe (*Nat., 

 Sep. '03). On tree stumps. 



Trans. Y.N.U., 1904 (pub. 1904). Bot. Series, Vol. 6. 



