SOUTHERN POLYPORES 23 



Found once on dead wood in North Carolina. It is very 

 near P. arcularius. 



7. POLYPORUS ARCULARIUS (Batsch) Fries 



Pileus circular, convex, umbilicate, 1-2.5 X 0.1-0.2 cm.; 

 surface azonate, concentrically rugose when dry, fuscous- 

 squamulose to fulvous and nearly glabrous ; margin acute, ciliate- 

 dentate, straight, inflexed on drying; context white, membranous; 

 tubes slightly decurrent, rather firm, white to brownish, 1-2 

 mm. long, mouths large, oblong-rhomboid, 1-2 to a mm., edges 

 thin, elongate, denticulate; spores cylindric, pointed at the ends, 

 2-guttulate, copious, 7-8 X 1.5-2.5 /x; stipe central, slender, 

 even, fuscous-gray to fulvous, subsquamulose to glabrous above, 

 hispid-tomentose at the base, 2-4 cm. long, 2-3 mm. thick. 



Common throughout on dead branches and trunks of various 

 trees. P. arculariformis Murrill may be a depauperate form of 

 this species. 



8. POLYPORUS TRICHOLOMA Mont. 



Pileus circular, convex to infundibuliform, usually cespitose, 

 1.5-4 X 0.05-0.2 cm.; surface white or pallid to ochraceous or 

 reddish-brown, azonate, fibrillose to glabrous; margin straight 

 or inflexed, conspicuously ornamented with rigid hairs, or cilia, 



2 mm. long and of uncertain duration; context pallid, membra- 

 nous, tough; tubes slightly decurrent, white to pallid, 0.5-1 mm. 

 long, mouths angular, 5 to a mm., edges thin, dentate, elongate; 

 spores ellipsoid, 2-2.5 X 6-7 n; stipe central, equal, glabrous, 

 concolorous, very slender, 1.5-2.5 cm. long, 1-1.5 mm. thick. 



Frequent near Austin, Texas, on dead sticks and logs in woods. 



9. POLYPORUS CAUDICINUS (Scop.) Murrill 



Hymenophore of immense size, reaching 50 cm. in breadth and 



3 cm. in thickness, usually found in imbricate masses projecting 

 from the trunks of living trees; pileus subcircular and umbili- 

 cate when young, soon becoming flabelliform and explanate; 

 surface ochraceous to fulvous, covered with broad, appressed, 

 darker scales, which are very close together in young specimens; 

 margin involute, thin, entire; context fleshy-tough, juicy, milk- 

 white, very thick, odor strong; tubes decurrent, white or pale- 

 yellowish, very short, mouths large, alveolar, I mm. or more 

 in diameter, edges thin at maturity, toothed at an early age, 

 becoming lacerate ; spores broadly ovoid, 12 X 5 Ml stipe eccentric 



