413 
or whitish, the interspaces venose; stem stout, solid but spongy 
within, persistently white; spores white, globose, rough, .0003 in. 
broad ; pileus 3-6 in. broad; stem 1.5-—3 in. long, 6-12 lines thick. 
Under a hickory tree. Trexlertown, Pennsylvania. June. W. 
Herbst. 
Closely related to Russwla aepallens, from which it differs in 
having the margin of the pileus striate at first and more strongly 
so when mature, also in the pileus being spotted at first, the 
aang more distant, the stem persistently white and the spores 
white. 
MARASMIUS.: GREGARIUS. 
Pileus submembranous, glabrous, centrally depressed or 
broadly umbilicate, striatulate when moist, bay-brown or pale 
alutaceous, a little darker in the center; lamellae narrow, subdis- 
tant, adnate, some of them branched, whitish; stem short, slender, 
inserted, hollow, flocculose or almost pubescent, pale bay-brown, 
a little darker toward the base; spores subglobose, about .00016 
In. broad ; plant gregarious; pileus 4 to 6 lines broad; stem 4 to 
6 lines long, about .5 line thick. 
es Decorticated wood. Mammoth Cave, Kentucky. June. C.G. 
oyd. 
PANUS BETULINUS. 
Pileus thin, suborbicular or dimidiate, nearly plane, glabrous, 
Prolonged behind into a short stem, grayish-brown, darker or 
lackish toward the stem; lamellae narrow, close, decurrent, 
whitish; stem adorned with a slight tawny hairiness which is 
more fully developed toward the base; spores minute, .00016 to 
002 in. long, .00006 to .00008 broad. 
Decaying wood of birch. Newfoundland. October. Rev. A. 
C. Waghorne, 
LENTINUS MAGNUS. 
Pileus thick, hard, convex, slightly depressed in the center, 
8'abrous, dingy-white, the surface cracking into broad areolae 
i, Scales, margin involute, flesh whitish; lamellae broad, close, 
thick, slightly decurrent, coarsely déntate or lacerate on the edge, 
id; stem stout, hard, solid, squamose, slightly thickened at the 
ase, colored like the pileus; spores oblong-elliptical, .0003 in. 
lone’ C015. broad ; pileus 6 in. or more broad, stem about 4 in. 
‘ong, I in. or more thick. : - 
: Gregarious on ground abounding in humus. Mount San — 
_ Antonio, California. August. Prof. A. J. McClatchie. 
