Mukrill: Additional Philippine Polvpokaceae 413 



Pyropolyporus subextensus Murrill, sp. nov. 



Pileiis large, woody, sessile, dimidiate, api)lanate, slightl}' con- 

 vex below, 7-8 X 10-12 X I cm. ; surface rough, slightly sulcate, 

 glabrous, thinly encrusted, opaque brown ; margin slightly lobed, 

 very obtuse, fulvous, sterile : context ferruginous, multizonate, 

 woody, nearly i cm. thick; tubes short, 1-2 mm. long each sea- 

 son, fulvous in older layers, grayish fuscous in those of recent 

 growth, mouths minute, fulvous, circular, thick-walled, 7-8 to a 

 mm., edges thick, entire: hyphae ferruginous, 3-4/i; cystidia 

 flask -shaped or irregular in outline, pointed, fulvous, very abun- 

 dant, 15-30// long, 8-io/i thick at the base. 



Type collected on dead wood at Camp Keithley, Lake Lanao, 

 Mindanao, September, 1907, by Mary S. Clemens. Also collected 

 on Mt. Apo, 2000 m., Davao, Mindanao, April 22, 1904, by E. 

 B. Copeland, " Zi." 



Pyropolyporus tenuissimus Murrill, sp. nov. 



Pilcus thin, woody, rigid, dimidiate, concave above,- convex 

 below, decurrent behind, 1-1.5 x 4-5 x 0.1-0.2 cm.; surface 

 rough, spongy-tomentose to subglabrous, neither sulcate nor zon- 

 ate, fulvous to fuliginous, thicker and more spongy near the mar-, 

 gin, which is fulvous, finely tomentose, rather thick, undulate : 

 context fulvous, very thin, punky to corky ; tubes stratified, 0.5 

 mm. or less long each season, cinereous-fuscous within, mouths 

 whitish-stuffed when young, minute, 6 to a mm., circular, regular, 

 avellaneous at first, becoming darker at maturity, edges thick, 

 entire: spores globose, smooth, hyaline, copious, 3-4//-; hyphae 

 melleous, 2-3 fi ; cystidia fulvous, cuspidate, scanty, i 5- 20// long, 

 5-7 fi thick at the base. 



Type collected on dead wood in Davao, Mindanao, March 13, 

 1904, by E. B. Copeland, ^gy. 



Pyropolyporus tricolor Murrill, sp. nov. 



Pileus very large, applanate, comparatively thin, rigid, woody, 

 15 X 25 x 1-2 cm.; surface roughly tuberculose and ridged, 

 irregularly sulcate, thinly encrusted, glabrous, dark brown to dull 

 black, rimose in dried specimens; margin thin, obtuse, reddish, 

 subentire : context woody, brick-red, with white dendroid mark- 

 ings, 5-8 mm. thick ; tubes 4-5 mm. long each season, brick-red 

 in the older layers, yellowish red with white lines in recent 

 growths, mouths minute, regular, circular, glistening, melleous, 4 

 to a mm., edges rather thick, entire : spores subglobose, smooth, 

 hyaline, with smoky brownish, rather thin walls, 5-6 a; hyphae 

 melleous, 3-4//; cystidia none. 



