66 THE CHICAGO ACADEMY OF SCIENCES 



Marasmius nigripes Schw. 



Pilcus membranaceous, campanulate, umbonate, striate, 

 somewhat pellucid, pure white. 



Lamellae adnate, arcuate, rather broad, pure white, growing 

 pale. 



Stems somewhat bulbous, black, white-farinose. 



The stems arc 3.5 cm. long, black but wholly covered over 

 with a white meal which may easily be rubbed off. 



On dead leaves in woods. June, July. The white-mealy 

 covering gives the stem a leaden-gray appearance. Pileus 8 to 

 16, exceptionally 25 mm. broad. Spores resembling in shape the 



id of buckwheat. For a good figure of the species and of its 

 peculiar spores, sic Lloyd's Mycological Notes, No. 107. 



LENTINUS. 



Pileus fleshy-coriaceouSj pliant, or in fleshy species 1> scorning 



hard when old, persistent; hymenophore continuous with the 

 stem or at the base of the pileus when sessile; Lamellae concrete 

 with the hymenophore, thin, unequal, membranaceous, with the 

 edge serrated or torn in a toothed manner. Growing on wood. 

 Spores somewhat round, even, white. 



(Hennings, in Pflanzenfamilien I'** p. 222. reduces this to a 

 subgenus of Panus, stating that the two genera cannot tie separated 

 for the reason that "in most of the Lentinus species the lamellae 

 are entire; being sen-ate only in the fleshy kinds.") 



Pileus stipitate 1 



Pileus senile L. pelliculosus. 



1. Pileus scaly. . . 2 



1. Pileus villous. . .. L. Lecomtei. 



1. Pileus smooth. .. . L. cochleatus. 



2. Pileus thick, convex or depressed. . /.. lepid( US. 



2. Pileus thin, umbilicate . L. tigrinus. 



Lentinus pelliculosus Fr. 



Sessile, imbricated. Pileus tough, membranaceous, reniform, 

 very thin, strigose, brown-tawny, the margin naked, involute. 



Lamellae broad, torn, pallid. "Pileus strigose with a dense 

 hairy coat like the skin of some animal." Morgan. 



On a stump of Querzus, woods, Glencoe. September, 1902. 



The coating of the pileus is tawny-cinnamon on the disk, paler 

 toward the margin, and is like a very coarse tomentum, the in- 

 dividual hairs or fibers of which are about 2 mm. in Length. Spores 

 pure white, globose, 3 //.. in diameter. 



Lentinus Lecomtei Fr. 



Pileus fleshy-tough, infundibuliform, reflexed, hairy, tawny. 



Lamellae serrate, crowded, pallid. 



Stem short, hairy. 



Pileus 2.5 to 7."> cm. broad. 



