112 



Mycologia 



phores, broadly attached, plane to slightly convex below, length 

 2-12 cm., breadth 3-12 cm., thickness 2-8 cm.; surface concen- 

 trically sulcate, very rimose, fulvous to brownish-black; margin 

 broad, obtuse, luteous to dark brown, tomentose ; context woody, 

 fulvous, at length becoming dark reddish-orange, i to 1.5 cm.; 

 tubes faintly or not at all stratified, from i cm. long in very young 

 sporophores to .2-.5 cm. in older ones each season, i to 2 to a 

 millimeter, yellow within during first season, later becoming brick- 

 red, mouths circular, yellow, edges obtuse, thin ; spores very 

 abundant, spheroid, broadly ovoid or ellipsoid, smooth, 5-6 X 

 6-8 /X, pale yellow, cystidia apparently none. 



Type locality : El Capitan Mountains, New Mexico, at an 

 altitude of 2100 meters. 



Habitat : Trunks of living trees of Jiiniperus monosperma 

 (Eng.) Sarg., /. iitahensis (Eng.) Lemm., and /. sabinoides 

 (H.B.K.) Sarg. 



Distribution: Texas, New Mexico (very common), Arizona, 

 and Colorado. 



The sporophores of this fungus are fairly common wherever 

 the rot is found, and are attached directly to the bark on areas 

 where the rot has reached the surface of the tree. They are 

 located usually within ten feet of the ground in narrow longi- 

 tudinal furrows or depressions in the trunk. The damage to the 

 trees is often extensive ; 'in some instances the trees are weakened 

 to such an extent, especially near the butt, that they bend or 

 break at this point; in any event a tree thoroughly infected by 

 this fungus is unfit for commercial purposes. This rot is appar- 

 ently rare in Texas, as only one sporopliore has been found. It 

 is replaced here by Fomes texaniis. 



Stringy Brown Rot of Juniper 



Fomes texanus (Murrill) Hedge, and Long 



Pyropolyporus texanus Murrill, N. Am. Fl. 9: 104. 1908. 



Rot reddish-brown, light brown adjacent to the sound wood, 

 characterized by layers of badly rotted wood alternating with 

 more or less sound layers. The rotted regions correspond ap- 

 proximately to the spring wood of the annual rings and the sound 

 layers to the summer wood, thus making a species of stringy 

 brown rot arranged in concentric rings in a cross section view. 



