124 BASIDIOMYCE TES 



inches long. The lamellae are usually yellow, but in the variety 

 semi-SiDigiiineus they are blood red. 



C. collinitus has a glutinous, yellowish-tawny or yellow pileus two 

 to three inches wide, with a solid stem two to four inches long, 

 which often cracks transversely. 



Flaniniula also belongs to this group and can be easily recog- 

 nized by its decurrent lamellae and its habit of growing on wood. 

 It has a dozen or more American species. Allied to this genus, but 

 with scarcely apparent veils, are the genera Naucoria,^ Inocybe,-\ 

 Titbaria\ and HcbeIoma.\ 



The remaining genera constitute the Evelatae, possessing 

 neither volva nor annulus, the pileus not being bound to the stipe 

 with a veil of any kind. In this group Hennings {Joe. cit.) plays 

 havoc with the genera as usually understood. || We treat them 

 here as they have been treated by Fries, although it is more than 

 likely that some changes in nomenclature will be necessary on ac- 

 count of some names having previously been used for other plants. 

 Except for a single scarcely natural sub-division based on the 

 position of the stem, the genera are most simply grouped by the 

 spore characters. 



I . IVif/i latej'al stems or no stems luhatever. 



The oyster mushrooms, belonging to the genus Pleurotus, are 

 easily recognized by their white or whitish spores. Some of them 



^ Nineteen specimens of Nmicoria are reported from the United States ; 

 of these Peck (Reg. Rep. 23 : 91-93) describes seven Xew York species. 



■\ Eight species of Inocybe are American ; Morgan (Jour. Cincinnati 

 Soc Nat. Hist. 6 : 104-106) describes all these species since they occur 

 in Ohio. 



\ Two species only are reported from America Cf. Ivlorgan, Jour Cin- 

 cinnati Soc- Nat Hist. 6 : 109, no. 



§ Eighteen species of Hebeloma are American. Peck (Reg. Rep 23 : 

 95) 96), describes the six New York species then reported. 



II Hennings, loc. cit., 230-268, combines Psathyrella and Paiiaeoliis un- 

 der the genus Coprinarins ; Agai-icus (in the usual sense), and Stropharia 

 under the genus Psattiota ; Crepidotu^, Pluteoliis and Gatera under Der- 

 Tninus ; all the pink-spored genera vrndox I{ypo)-kodius ; and finally com- 

 bines Pleurotus, OmpJialia, Jlycena, Cctlybia, Ctitocybe and TricJiotovia 

 under Agaricus ! ! 



