MYCOLOGIA 



Vol XI May, 1919 No. 3 



ILLUSTRATIONS OF FUNGI— XXX 



William A. Murrill 



In the accompanying plate, an attempt has been made to illus- 

 trate a few of the larger polypores, which would require much 

 more space for adequate representation. The species selected 

 occur on living or dead trees in the vicinity of New YorJ^L. City 

 some of them in abundance. 



Ganoderma Tsugae Murrill JUN 11 ]9]9 



Hemlock Ganoderma \ ^ 



Plate 6. Figure \. X 



Pileus corky to woody, fan-shaped, convex above, concave 

 below, 4-20 X 5-25 X 1-4 cm. ; surface glabrous, uneven, con- 

 centrically sulcate, laccate, lustrous, yellowish-red to mahogany- 

 colored, at length black ; margin light-yellow, acute, becoming con- 

 colorous, truncate, and marked with many shallow furrows, often 

 undulate and at times more or less lobed ; context soft-corky, 

 radiate-fibrous, white or nearly so, 1-3 cm. thick ; tubes annual, 

 0.5-0.75 cm. long, 4-6 to a mm., brown within, mouths circular 

 or polygonal, white to light-cinnamon, edges obtuse, becoming 

 acute ; spores ovoid, obtuse at the base, attenuate and truncate at 

 the apex, appearing verrucose, yellowish-brown, 9-1 1 X 6-8 ix ; 

 stipe lateral, ascending, frequently forked, cylindric, equal, 

 2-20 X 1-4 cm., resembling the pileus in color, surface and 

 context. 



Common on decaying trunks, stumps, and roots of hemlock 

 throughout the range of this tree in America. The varnish be- 

 gins to exude from the very young hymenophore, as shown in the 

 figure, and soon spreads over the entire surface. The generic 

 name refers to this character. 



[Mycologia for March (ii : 51-100) was issued March 17. 1919-] 



101 



