112 AGARICINI. 



Genus XXXIX. I^ENTINUS. Fr. 



Lentus, tough or pliant. 



This genus is characterized by the fleshy and leathery 

 structure, and the edge of gills serrated or torn in a toothed 

 manner. Spores white, orbicular. Nearly all grow on wood. 

 A very natural genus, 3'et very polymorphic. 



If. tigrinus. Tiger-spotted Lentinus. 



Pileus, fleshy coriaceous, orbicular, umbilicate, whitish, 

 clothed with innate scales. 



Gills, attenuated, narrow, decurrent, toothed, white, then 

 yellowish. 



Stem, thin in proportion to the cap, squamulose, with a 

 decided veil. 



Not very abundant. Specimens were found on rotten logs at East 

 Penn Junction, near Allentown. 



ly. lepidius. Fr. 



Pileus, fleshy, compact, convex, then depressed, unequal, 

 broken up into darker scales. 



Gills, sinuate, decurrent, broad, torn, transversely striated, 

 whitish. 



Stem, stout, tomentose scaly, often crooked. 



Common on railroad ties on the Catasauqua & Fogelsville Railroad. 



The pileus is beautifully scaled, ochraceous, brown, irregular, excentric. 

 Stem is tomentose scaly. Some grow to an immense size. Fries men- 

 tions a specimen found which was more than two feet in height, growing 

 from a dense leathery stratum which covered yards of wood, from which 

 grew here and there an infundibuliform pileii. 



I/, umbilicatus. Pk. 

 Pileus, umbilicate, dry, tough, bay brown. 

 Gills, arctuate, broad, strongly serrate, distant. 

 Stem, even, bent according to the attachment to the wood. 

 The umbilicate Lentinus is common on rotten oak limbs throughout 

 the Valley. It appears late in fall. 



