VoL. 31 | No. 8 
BLE LN 
OF THE 
~ TORREY BOTANICAL CLUB 
AUGUST, 1904 
Th Polyporaceae of North America—VIII. Hapalopilus, Pycnoporus, 
and new monotypic genera 
WILLIAM ALPHONSO MURRILL 
HAPALOPILUS Karst. Rev. Myc. 3: 18. 1881 
This genus was established upon a single species, H. xidulans 
_(Fr.), the chief distinguishing characters being an anoderm surface 
nd fleshy-tough context. In his work on Finland basidiomycetes 
ublished in 1889 Karsten reduces Hapalopilus to a subdivision of 
he genus /nxonotus, throwing white-spored and brown-spored 
forms together. The forms treated under this genus in the pres- 
. Sublilacinus differs from the other species in growing upon con- 
ous instead of deciduous wood. 
In distribution the species differ widely. H. rutilans occurs 
her abundantly in the temperate regions of North America and 
rope, 1. gilvus is exceedingly common throughout North 
‘merica in both temperate and tropical regions and /. Licnordcs is 
common tropical American species. The other three are as yet 
nown only from their type localities, which are southern. A very 
line of division exists between H. rutilans and the other 
es, which latter bear distinct evidence of recent common 
When the great variability of . gi/#us is taken into con- 
tion, it appears to be only a question of a comparatively 
time before several new species will be evolved. 
The preceding number of the Bu1LETIN, Vol. 31, No. 7, for July, 1904 (31: 
14,) was issued 29 July, 1904.] 
415 
