68 
Mycologia 
Collybia subdecumbens 
Pilus thin, submembranous, convex or broadly convex, gla- 
brous, grayish-brown or blackish-brown; lamellae thin, subclose, 
arcuate, adnate, variable in color, whitish-cinereous or tinged with 
pink ; stem straight or nearly so, abruptly bent and decumbent at 
the base, often compressed and sometimes canaliculate, stuffed 
or hollow, white, shining; spores ellipsoid, 10.5 X 4 
Pileus 1-3 cm. broad ; stem 4-7 cm. long, 2-5 mm. thick. 
Among fallen oak leaves. Stow, Massachusetts. November. 
S. Davis. 
Pileus tenuis, submembranus, convexus vel late convexus, glaber, 
griseo-brunneus vel nigrescente-brunneus ; lamellae tenues, sub- 
confertae, arcuatae, adnatae, in colore variabiles, albidae, cinereae 
vel subincarnatae ; stipes rectus vel subrectus, basi abrupte decum- 
bentus, saepe compressus, aliquando canaliculatus, farctus ca- 
vusve, nitidus, albus; sporae ellipsoideae, io.5X4/«- 
Collybia truncata 
Pileus thin, conic or subcampanulate, prominently umbonate, 
with a truncate umbo, subfibrillose, rarely rimosely areolate, 
grayish-brown or reddish-brown ; lamellae rather broad, subven- 
tricose, subdistant, adnexed, whitish or subcinereous, becoming 
reddish where bruised ; stem equal, flexuous, fibrillose, stuffed or 
hollow, radicating, colored like the pileus ; spores subglobose or 
broadly ellipsoid, 6-8 X 5-6 
Pileus 2-3 cm. broad; stem 2.5-4 cm. long, 1.5-2. 5 mm. thick. 
Pine woods. Stow, Massachusetts. November. S. Davis. 
Remarkable for its radicating stem, truncate umbo and change 
of color assumed by the wounds. 
Pileus tenuis, conicus vel subcampanulatus, prominente umbo- 
natus, umbone truncato, subfibrillosus, rare rimose areolatus, 
griseo-brunneus vel rufescente-brunneus ; lamellae sublatae, sub- 
ventricosae, subdistantes, adnexae, albidae subcinereaeve, obtusis 
rufescentibus ; stipes aequalis, flexuosus, fibrillosus, farctus ca- 
vusve, radicatus vel basi decumbens, pileo in colore similis ; sporae 
subglobosae vel late ellipsoideae, 6-8 X /“• 
Entoloma mirabile 
Pileus conic or subcampanulate, with a prominent umbilicate 
umbo, thin, submembranous, minutely furfuraceous or subsqua- 
mulose, blackish-brown ; lamellae arcuate, adnate, subdistant, 
