650 Murrill: Polyporaceae of North America 



sometimes in orchards. His following brief description is accom- 

 panied by copious notes : 



"Boletus acaulis, semicircularis, plano-convexus, albissimus, supra hirsutissimus, 

 lineis concentricis alternis depressis; subtus poris rotundato-angulatis." 



Wulfen's name, however, is preoccupied by Scopoli for the 

 plant usually known as Polyporus liispidus Fr. (see Bull. Torrey 

 Club 31 : 594. 1904) and Schweinitz's name must be used for 

 the present species. It was first applied to specimens collected on 

 trunks of Liriodendron in North Carolina and afterwards on the 

 same host in Pennsylvania, to which host Schweinitz thought it 

 was confined. 



It must be confessed that this form on Liriodendron looks dis- 

 tinct when seen in the field, being large and rigid, with short 

 tomentum and a broad black marginal band ; but I am convinced 

 that this is an undeveloped stage, deserving possibly varietal, but 

 not specific, distinction. Type plants in the Schweinitz herbarium 

 appear fully developed and not at all unlike ordinary forms on 

 other deciduous trees. 



This species is very abundant throughout the United States 

 and Canada on all kinds of decaying deciduous wood, the form on 

 Liquidambar especially being very similar to that from the European 

 type locality. In early summer the sporophores make their ap- 

 pearance as very dark brown hairy swellings on decayed wood or 

 the remains of older pilei and grow rapidly into conchate fruit- 

 bodies of tough elastic substance and hirsute surface marked with 

 concentric zones of gray and brown. The hymenium may be 

 yellowish or fuscous and the pores circular or irregular, with 

 thin, dentate dissepiments equaling the thickness of the context in 

 length. No shining glabrous zones make their appearance as is 

 the case with C. versicolor. 



Specimens too numerous to mention here have been examined 

 from various parts of Europe, Asia and North America. 



18. Coriolus Sullivantii (Mont.) 



Polyporus Sullivantii Mont. Ann. Sci. Nat. Bot. II. 18 : 243. 



1842. 



Described from plants collected on fallen dead branches in 

 Ohio by Sullivant and sent to Montagne by Asa Gray. Little is 



