524 CLASS BASIDIOMYCETEAE 



Not as above. 



Stipe typically fleshy; spore print typically dull earthy brown to deep 

 rusty brown. Agrocybe 



{Pholiota in part) 

 Stipe typically cartilaginous; spore print yellowish brown to rusty brown. 



Conocyhe 



{Galera in part) 



Key to the More Important Centrally Stipitate, Soft, Putrescent Genera 



of Melanosporae 



Gills deliquescing at maturity; basidia separated by broad paraphyses. 



Coprinus 



Gills not deliquescing. 



Pileus with cuticle formed of pyriform or vesiculose cells arranged in a palisade, 

 or in a compact layer one or more cells thick; fruiting body typically 

 fragile. 

 Gills spotted by the maturing spores; spores not discoloring rapidly in con- 

 centrated sulfuric acid. Panaeolus 

 Gills not conspicuously spotted by the maturing spores. 



Pileus plicate-striate; paraphyses coprinoid. Pseudocoprinus 



Pileus not plicate-striate, or, if so, paraphyses not coprinoid. 



Psathyrella 

 (including Hypholoma in part) 

 Pileus with cuticle formed of slender filamentous hyphae (cells vesiculose in a 

 few, but then formed by the breaking up of chains, and surface of the 

 cap appears powdery). 

 Annulus typically present. 



Gills free; stipe readily separating from pileus. Agaricus (Psaliota) 

 Gills attached; stipe not readily separable. Stropharia 



Annulus not present; veil if present adhering to cap or along its margin. 

 Gloeocystidia present in hymenium; typically lignicolous, or on peat or 

 muck (if on dung or humus, see Stropharia). Naematoloma 



{Hypholoma in part) 

 Gloeocystidia not present though other types of pleurocystidia may be 

 present and abundant. Psilocybe 



Literature Cited 



Ames, Adeline: A consideration of structure in relation to genera of the Poly- 

 poraceae, Ann. Mycol, 11(3) :21 1-253. Pis. 10-13. 1913. 



Atkinson, George F.: The development of Agaricus campestris, Botan. Gaz., 

 42(4):241-264. Pis. 7-12. 1906. 



: The development of Lepiota clypeolaria, Ann. Mycol., 12(3):346-356. 



Pis. 13-16. 1914a. 



: The development of Amanitopsis vaginata, ibid., 12(4):369-392. Pis. 



17-19. 1914b. 

 : The development of Armillaria mellea, Mycolog. Centr., 4(3) :1 13-121. 



Pis. 1-2. 1914c. 

 : Homology of the "universal veil" in Agaricus, ibid., 5(1) :13-19. Pis. 1-3. 



1915. 



Origin and development of the lamellae in Coprinus, Botan. Gaz., 



61(2):89-130. Pis. 5-12 and 6 diagrams. 1916. 

 Baxter, Dow V. : Some resupinate Polypores from the region of the Great Lakes, 



