46 NEW YORK STATE MUSEUM 
Pileus carnosus, tenuis, convexus subplanus vel in centro de- 
pressus, fragilis, glaber vel leviter fibrillosus, brunneus vel ni- 
gresco-brunneus, in margine Striatulatus, demum undatus rimo- 
sus vel irregularis; lamellae tenues, subdistantes, latae, adnatae, 
albae incarnatescentes; stipes aequalis, fragilis, flexuosus, glaber 
vel fibrillosus, solidus vel cavus, albus brunneusve; sporae sub- 
globosae, angulares, uninucleatae, 10-12 x 8-10 up. 
Pileus 1-3 cm latus; stipes I-2 cm longus, I-2 mm crassus. 
Polycephalum subaurantiacum 
Stem slender, 1-3 mm long, slightly attenuated upward, thick- 
ened or bulbous at the base, clothed with ascending mostly whit- 
ish hairs, simple or slightly branched above, composed of united 
hyphae, orange colored below, white above, the fertile ones 
bearing 1-4 globose or subglobose minute whitish heads of 
spores; spores ellipsoid or subglobose, hyaline, 4-6 x 3-4 p. 
Gregarious on branchlets of avocado or alligator pear, 
Persea gratissima Gaertn.f. Cuba. September (@am- 
municated by M. T. Cook. 
Sometimes two or three stems start from the same hairy bulb. 
The species is apparently closely related to Polycep halum 
aurantiacum K. & C. and may be a variety of it but from 
which it may be separated hecause of its slender generally taper- 
ing or subulate stem which is white above and because of its 
larger spores. The hairs of the bulb are usually concolorous 
with it, those of the stem are white or whitish. They are ap- 
parently the diverging tips of some of the component hyphae of 
the stem. 
Stipes gracilis, I-3 mm longus, sursum leviter attenuatus, basi 
crassus vel bulbosus, vulgo pilis ascendentibus albidis hirtus, 
simplex vel leviter supra ramosus, hyphis coalitis compositus, 
infra aurantiacus, supra albus, fertilibus sporarum capita I-4 
minuta globosa vel subglobosa albida producentibus; sporae 
ellipsoideae vel subglobosae, 4-6 x 3-4 uh. 
Psilocybe cystidiosa 
Pileus thin, convex or subconic, glabrous, hygrophanous, pale 
brown when moist, yellowish drab with a brownish center and 
sometimes obscurely striate on the margin when dry, sometimes 
becoming lacerated when expanded, flesh white, taste nutty; 
lamellae thin, close, adnate, whitish becoming purplish brown, 
