204 Melanosporae : Chitonia Agaricus. 



Psathyra. Stem fragile ; edge of pileus straight when young. 

 Psilocybe. Stem tough ; edge of pileus incurved when young. 



tttt Gitts adhering laterally when young, deliquescing 

 at maturity. 



Coprinus. Ring and volva present in some species, ring alone 

 others, both absent in others ; gills adnate, adnexed or free. 



ft 1 1 1 Flesh of pileus entirely absent, the gills radiating 

 from the stem free and unconnected by flesh above. 

 Montagnites. Volva present, buried in the ground. 



CHITONIA, Fr. 



rubriceps, Cke. and Mass. P. 2 3 cm. campan. then exp. umb. 

 reddish-brown ; g. free, purplish-brown ; s. 67 cm. hollow, paler 

 than p., volva large, free edge torn ; sp. 12x6. 



Introduced along with living plants into Kew Gardens. 



[coprinus, Fr. ( = Ag. inrolucratus, Mont.) P. fleshy, convex, 

 viscid, yellowish, sometimes floccosely scaly from fragments of volva ; 

 g. free, smoky-black ; s. fistulose, naked, whitish, volva very small. 



Unless the small volva is noticed, this fungus will be considered 

 as a sp. of Coprinus. 



AGARICUS, L. 

 A. EDULES. Large, 



augustus, Fr. P. 8 14 cm. globose then exp. very obtuse, disc 

 even, rest fibrillosely- scaly, pale yellow- brown ; g. crowded, narrow, 

 fuscous, remote from stem ; s. 8 14 cm. solid, ring superior, large, 

 areolately squamulose below ; sp. 6 x 3'5. Edible. 



peronatus, Mass. P. hemispher. then exp. dull ochre, densely 

 scaly ; g. distant from stem, crowded, purple-brown ; s. 10 14 cm. 

 equal, marginately bulbous, hollow, with large spreading white scales 

 up to broad spreading ring ; sp. 6 x 4. Edible. 



Differs from A. augustus in hollow, peronate stem. 



elvensis, B. and Br. P. 9 15 cm. subglobose then exp. fibrillose, 

 broken up into large persistent brown scales, edge warted ; g. 

 crowded ; s. 8 12 cm. narrowed at base, fibrillose, ring large, thick, 

 warted below ; sp. 8 x 4. Edible. 



[praenitens, Beck. P. hemispher. exp. white, with densely 

 imbricated chestnut scales which become smaller and denser at 

 disc ; g. remote, purple-brown, edge white ; s. clavato-bulbous, con- 

 centrically scaly up to large ring, white ; sp. 7 8 x 5. 



