508 NOTE ON POLYPORUS LUCWrs LEVSS. 



gether. TJic fnictificatiuns have thu> far reappeared three 

 times after having been broken off. This adds an instance of the 

 longevity of the mycehum of the fungus, and its abiHty to con- 

 tinue developing sporophores for a considerable time after the 

 death of the host plant. The fungus evidently grew from .some 

 tree which was cut down and covered with concrete at the time 

 building was proceeded with, and I am informe 1 that a large 

 tree did grow in the vicinity where the fructifications now con- 

 tinue to reappear. 



Unfortunately I could not gather any information on the 

 kind of tree or its condition at the time the house was built, 

 though it is evident that it must have harboured the fungus even 

 at this time, and most probably was well on the way to decay. 



Fructification ok Spokochori-: of polyporus lvcidus. 



Plants variable, annual, se.-^sile. or stipitate (Plates 12-15). 

 Pileus dimidiate or reniform in outline, imbricate or connate at 

 times, flat, or convex abo\e and concave below, 10-25 X 8-9 

 X 8-17 cms., thickest behind ; leathery, corky when fresh, be- 

 coming corky or woody on drying ; upper surface covered with 

 a dark chestnut red or brown varnish, wrinkled or concentrically 

 sulcate. and at times dotted over with irregular tubercles (Plate 

 I5f). Context varying whitish to light brown, frequently separ- 

 ating into an upper light-coloured, softer region and a lower 

 darker and firmer region (Plate 12), at times of the same 

 colour and texture throughout ; concentrically banded and 2-3 

 cms. thick. 



Stalk absent or present, lateral, irregularly cylindrical, lac- 

 cate, resembling pileus in colour and substance, 3-5.5 cms. 

 diameter X 2-6 cms. long. In the specimen of Plate i5f the 

 stalk was short, measuring 14 X 6 cms., and was apparently 

 three fused stalks, as was indicated by the upper surface of the 

 pileus and the incomplete fusion of one stalk. From one of the 

 fused stalks a secondary ])ileus was growing. In Plate 12 

 also we have separate ])ilei. In these cases the hymenium 

 is confluent and the pilei overly]), as is evident in the illustration. 



Margin acute, often undulating and turned inwards, rarely 

 truncate. In the s])ecimens taken from the willow stem the 

 pileus was jjractically white toward^ the i)eriphery and the 

 margin of the same colour. These were evidently not yet ma- 

 ture. In the specimens the margin showed tawny bands, and 

 on the under surface a sterile region 3-4 mm. wide, yellow, and 

 later becoming brown. 



Tubes 1-1.2 cms. long, brown within, 162.5-187.5 /a across, 

 dissepiments narrow, 62-100 n\ mouth circular or angular, 3-4 

 to the mm., white becoming brown, darken on being bruised. 



The hymenium often shows red. varnished i)atches on which 

 no pores are produced. 



In herl)arium material the jxire mouths were at times ob- 

 .served to change from white to light yellow. Spores (Fig. i) 

 yellowish brown, varying from smooth to punctate and decidedly 



