AGARICALES 



455 



The Agaricales include approximately 100 genera with about 10,000 

 species. They are of fatiguing regularity and hence, despite the numer- 

 ous unanswered questions, have been little studied from the point of 

 view of comparative ontogeny. Actual systematic classification will 

 be largely influenced by considerations of the herbarium systematist, 

 and founded on the consideration of the color of the mature fructification 

 and spores. The color of the spores in mass has offered assistance in the 

 preparations of keys; the genera with white spores have been grouped 

 as the Leucosporeae, those with violet brown spores as Amaurosporeae, 

 those with brown (red or ochraceous brown) spores as Phaeosporeae, 

 those with pinkish or flesh-colored spores as Rhodosporeae, and those 

 with black spores, generally glistening violet, as Melanosporeae. 



AGARICALES 



COPRINACEAE 



Coprinus 



Leucocoprinus 



Bolbituis 



LACTARIACEAE 



Lactarius 

 Russula 



Amaniteae 



Psathyrella 



Hypholoma 



Stropharia. 



Psalliota 



Tubaria 



Pholiota 



Rozites 



Volvaria 



Amanitopsia 



Amanita 



Lepiota 



AGARICACEAE 



Schizophylleae 

 Schizophyllum 



Marasmieae 



Lentinus 

 Marasmius 



Clitocybeae 



Mycena . 



Entoloma 



Clitopilus 



Omphalia 



Clitocybe 



Trirholomateae 



Tricholoma 

 Armillana 

 Cortinarius 

 Inocybe 



BOLETACEAE 



Volvobolpfus 



Boletapsi6 



Boletus 



PAXILLACEAB 



Paxillus 



HYGROPHORACEAE 



Gomphidius 



Nyctalis 



Hygrophorua 



Diagram XXIX. 



A few representative genera of each of the seven families will be 

 briefly discussed, but figures of the different species will be omitted 

 because the necessary illustrative material, at least as far as it concerns 

 edible or poisonous mushrooms, occurs freely in the numerous guides 

 for mycophagists, as six of the families are more or less important as food : 

 the Hygrophoraceae, mainly gymnocarpous forms with thick decurrent 

 lamellae; the Lactariaceae, hemiangiocarpous forms without ring or 

 cortina and with the peculiar rosette structure of the tissue of the 

 fructification; the Coprinaceae, hemiangiocarpous forms with a character- 

 istic structure of the hymenium; the Paxillaceae, mainly gymnocarpous 

 forms with the tramal layer separable from the context; the Boletaceae 

 (gymnocarpous or pseudohemiangiocarpous, whose tramal layer is sepa- 

 rable from the pileus which, however, possesses tubes instead of lamellae; 



