MURRILL : POLYPORACEAE OF NORTII AMERICA 115 



have been obtained. It is truly rimosc like /v. Rolnninc, but dif- 

 fers decidedly from the latter in pore-structure and context, while 

 the spores are larger and less globose. It would be quite remark- 

 able if a group of plants from such widely separated localities did 

 not show specific differences. 



P. Rolnniae is abundant in the southern United States on 

 Robiiiia and extends with it as far north as Connecticut and west 

 to Missouri and Texas. I have not as yet seen it upon any other 

 host, but a plant recently collected by Earle in Jamaica on Acacia 

 cviarginata, nearly related to Robinia, seems not specifically dis- 

 tinct from it. When Robifiia was introduced into France several 

 centuries ago from Virginia this fungus must have been introduced 

 with it, since it was collected there by F. Fautrey in November, 

 1 89 1, growing on Robinia. The specimen is at Upsala and is 

 labelled P. igniarius. Among the many collections examined 

 from America, the following may be mentioned : Massachusetts 

 (Underwood) ; New York (Underwood, Earle, Murrill) ; New 

 Jersey (Ellis); Ohio (James, Morgan, Lloyd); West Virginia (Nut- 

 tall) ; Virginia (Miss V. W. Murrill); Alabama (Underwood, Atkin- 

 son, Earle). 



A good account of the destructive effects of this plant is given 

 by H. von Schrenk in Ann. Rep. Mo. Bot. Gard. 12 : 21-31. pL 

 1-3. 1 90 1. 



7. Pyropolyporus praerimosus sp. nov. 



A large ungulate plant with plane brown hymenium and a very 

 rimose blackish surface. Pileus woody, rounded ungulate, 8-12 

 X 7-10 X 8-1 1 cm.; surface exceedingly rimose after the first 

 year, broadly furrowed, the projecting ridges splitting away in 

 age, very dark brown to black ; margin obtuse, velvety, rusty to 

 hoary : context corky to woody, concentrically banded, fulvous, 

 0.5 cm. or less thick ; tubes indistinctly stratified, 1-2 cm. long 

 each season, 3 to a mm., concolorous within and without with the 

 context, mouths rounded to polygonal, ochraceous at first, edges 

 rather thick, obtuse, becoming thin and often splitting in age : 

 spores globose, smooth, deep ferruginous, 3-4 fx ; spines ferru- 

 ginous, 10-17 X 5-10//, largest at the base. 



Collected by Earle, July, 1900, on Qiierciis undidata in the El 

 Capitan Mountains, New Mexico, at an altitude of 7,000 feet. 

 Related to P. Everhartii (Ell. & Gall.). 



