J\6 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, 10-12x8-10 p. 



Pileus 1-3 cm latus ; stipes 1-2 cm longus, 1-2 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, 4-6x3-4 p. 



Gregarious on branchlets of avocado or alligator pear, 

 Persea gratissima Gaertn. f . Cuba. September. Com- 

 municated by M. T. Cook. 



Sometimes two or three stems start from the same hairy bulb. 

 The species is apparently closely related toPolycep halum 

 aurantiacum K. & C. and may be a variety of it but from 

 which it may be separated because 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, 1-3 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 1-4 

 minuta globosa vel subglobosa albida producentibus; sporae 

 ellipsoideae vel subglobosae, 4-6 x 3-4 fx. 



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, 



