28 SOUTHERN POLYPORES 



usually found at the base of a tree-trunk; surface smooth, 

 pallid to gray or brown; context white, fleshy or fleshy-tough, 

 rigid and fragile when dry; tubes large, irregular, thin- walled, 

 becoming friable or laciniate with age; spores hyaline, smooth 

 or rarely verrucose. 



Hymenium ochraceous, becoming dirty-yellow with age; plants 

 terrestrial, irregularly confluent, olivaceous to greenish- 

 yellow, i. G. ftavovirens. 

 Hymenium at first fuliginous, becoming paler. 2. G. Sumstinei. 

 Hymenium white or pallid from the first. 



Surface of pileus gray or grayish-brown to coffee-colored; 

 stipe intricately branched; pileoli very numerous and 

 small. 3. G. frondosa. 



Surface of pileus pallid or alutaceous; stipe not intricately 

 branched, lobes usually few in number and compara- 

 tively large. 4. G. Berkeleyi. 



I. GRIFOLA FLAVOVIRENS (Berk. & Rav.) Murrill 



Pileus at first simple and centrally stipitate, becoming imbri- 

 cate-multiplex when fully developed, 8-20 cm. in diameter; 

 pileoli soft, fleshy, fragile when dry, circular to flabelliform, 

 pulvinate or depressed to applanate, 5-10 cm. broad, 5-8 mm. 

 thick; surface sordid-yellow, with yellowish-green zones, be- 

 coming dull-yellowish-green, finely tomentose to subglabrous; 

 margin irregular, undulate to lobed, concolorous; context fleshy, 

 very fragile when dry, 2-4 mm. thick, white to yellowish; tubes 

 very decurrent, yellow to yellowish-green, 3-5 mm. long, mouths 

 irregular, circular to sinuous, 1-2 to a mm., at first milk-white, 

 becoming dirty-yellow, edges thin, fragile, lacerate with age; 

 spores subglobose, smooth, 3-4.5 M; stipe central or eccentric, 

 pallid, 3-6 cm. long, 1-1.5 cm. thick, becoming tubercular and 

 connate-ramose at maturity. 



Frequent on the ground in woods throughout. Very near 

 P. cristatus of Europe. Grifola poripes (Fries) Murrill is distinct 

 and doubtful. 



2. GRIFOLA SUMSTINEI Murrill 



A very large plant resembling G. frondosa in habit and general 

 appearance, but with fewer and broader pileoli, darker surface, 

 and darker hymenium. Pileus imbricate-multiplex, 20 X 30 

 cm. ; pileoli flabelliform to spatulate, 6-8 X 6-8 X 0.3-0.5 cm. ; 

 surface radiate-rugose, finely tomentose, light- to dark-brown; 

 margin very thin, fissured and strongly inflexed when dry; con- 

 text white, fibrous, fleshy-tough to almost leathery, 0.3 cm. 



