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MurrRILL: PoLyPpORACEAE OF NortTH AMERICA oo 
4. Potyporus DEuicatus B. & C. Grevillea, 1:-37. 1872 
Only one small plant of this species is to be found in the Kew 
herbarium. It was collected in Alabama by Peters, growing on 
decaying wood. It is uniformly ochraceous in color, tomentose, 
of soft elastic substance, with a thin undulate revolute margin. 
The tubes are angular, 2 to a mm., decurrent even to the base and 
quite collapsed when dry. The stipe is central and radicate, and 
the buried portion is darker in color than the rest. At first 
sight, the surface suggests Polyporus fractipes, the color being 
very similar in both, but the central stipe, firmer substance and 
much larger tubes of P. delicatus readily distinguish it from that 
species. 
5. PoLyporus pipapHus B. & C. Grevillea, 1: 36. 1872 
This plant resembles P. Polyporus in many respects, but its 
pore structure appears to be different. It was collected by 
Peters in Alabama on trunks of //er. The type at Kew is the 
larger share of a single specimen cut in two. A better de- 
veloped plant might show closer resemblance to P. Polyporus. 
One can never be entirely free from the suspicion that species 
résting upon a slight material basis and closely resembling species 
that are common and variable may possibly be only undeveloped 
or depauperate or abnormal forms of the more abundant species. 
It seems best, however, in the present instance to consider P. 
dibaphus as distinct until its relationships are more clearly proved. 
6. Polyporus Polyporus (Retz) 
Boletus Polyporus Retz, Vet. Ac. Handl. 253. 1769. 
Boletus brumalis Pers. Neues Mag. Bot. I: 107. 1794. 
Batsch, Elench. Fung. p/. ro, f. 42a. 1783. 
Boletus fasciculatus Schrad. Spic. 154. 1794. 
Polyporus brumalis Fr. Obs. Myc. 2: 255. 1818. 
Polyporus luridus B. & C. Grevillea, 1: 37. 1872. 
Polyporellus brumalis Karst. Medd. Soc. Faun. et. Fl. Fenn. 5: 
37... 1879, 
Polyporellus Polyporus Murrill, Jour. Myc. 9: 93. 1903. 
There are two forms of this widely distributed plant, both oc- 
curring throughout Europe and North America. It was the yel- 
