Psilocybe 



AGARICACEzE 



I8 5 



Nearly all the species grow on the ground and are gregarious 

 and sometimes ceespitose, a few grow on dung ; they are inodorous 

 and none are edible. 



Fig. 46. — A, Psilocybe semilanceata Quel. ; B, 6". spadicca Quel. 

 Entire and in section. One-half natural size. 



Psilocybe agrees in structure with Collybia, Leptonia, Naucoria 

 and Pa/iceolus. Species 845 — 871 



a. Tenaces. Veil rarely conspicuous. Pileus pelliculose, slightly 



viscid in wet weather, bright in colour, becoming pale. 



Stem with a thick tough bark, flexile, usually coloured. 

 Gills ventricose, not decurrent. 845 — 854 



Gills plane, very broad behind, subdecurrent 855 — 860 



Gills ascending sublinear. 861, 862 



b. Rigidce. Veil obsolete. Pileus scarcely pelliculose, flesh 



usually scissile, hygrophanous. Stem rigid. Gills adnexed, 

 rarely adnate. 863—871 



a. Tenaces. 



845. P. sareoeephala Gill, (from the fleshy pileus ; Gr. sarx, flesh, 

 kephale, the head) a b. 



P. expanded, obtuse, dry, pale tawny, salmon or pale ferruginous. 



St. whitish to rusty. G. adnato-rounded, salmon, then sooty. 



Flesh white, pale salmon in stem. 



Gregarious, subcrespitose. Woods, grassy places, usually about or near 

 stumps, elm. Sept. -Nov. 4 x 5f X f in. Resembles 230. 



845a. P. helvola Mass. (from the yellowish colour ; /iclvolus, pale 



yellow) a. 



P. campanulate or conical, convex, then expanded, obtuse, even, 



glabrous, tawny-ochreous ; mid. darker; cuticle often cracked 



into patches near mid. St. equal, hollow, fibrillose, often 



