5 



tt The universal veil arachnoid, distinct from the cuticle of the 

 pileus ; the lamellae soon pulverulent and somewhat cinnamon 

 with the spores Cortinarius 



B. Lamellae easily separable from the rest of the pileus Paxillus 



Sect. 4. Melanosporeae. 



I. Pileus fleshy, membranaceous, or becoming liquid A &" B 



A. Spores purplish-black or fuscous-purple rather than black (fus- 

 cous-ferruginous in the rare genus Bolbitiu?,) . . . § & §§ 



§ Lamellae not liquefying. 



Stem with an annulus but no volva, distinct from the substance of 

 the pileus ; lamellae free . . . Agaricus {Psalliota') 



Stem with an annulus but no volva, continuous with the substance 

 of the pileus ; lamellae adnate .... Siropharia 



Veil woven into a web separating from the stem and adhering to 

 margin of the pileus when young ; stem continuous with the 

 pileus ; lamellae adnate or sinuate . . . Hypholoma 



Veil none or obsolete ; stem tough ; margin of pileus incurved 

 when young ; lamellae not decurrent . . . Psilocybe 



Veil none or obsolete ; stem tough ; margin of pileus incurved 

 when young ; lamellae subtriangular-decurrent . Decotiica 



Veil none or obsolete ; stem fragile ; pileus with margin straight 

 from the first ; lamellae not decurrent . . Psathyra 



§§ Lamellae liquefying; becoming pulverulent and fuscous-ferru- 

 ginous with the spores ; pileus membranaceous . Bolbitius 



B. Spores black or nearly black . , . . . § & §§ 

 § Lamellae liquefying ...... Coprinus 



§§ Lamellae not liquefying. 



Pileus rather fleshy, not striate, with margin from the first extend- 

 ing slightly beyond the variegated lamellae ; stem without an 

 annulus ; spores broadly ovoid .... Panaeolus 



Pileus membranaceous, striate, not extending beyond the fuliginous- 

 blackish lamellae ; spores broadly ovoid . . Psathyrella 



Pileus fleshy ; lamellae decurrent, mucilaginous ; spores elongated- 

 fusiform ....... Gomphidius 



TL Pileus coriaceous \ spores minute, black. Resembles a Mai-as- 

 miiis but has black spores .... Anthracophyllum 



