56 NEW YORK STATE MUSEUM 



II Pileus subfleshy to membranous ; stipe smooth 

 pruinose, or subtomentose ; lamellae squarely 

 adnate or decurrent, free in a few small 

 plants with tomentose stipe 

 Pileus white 

 Lamellae decurrent 

 Pileus papillate 



Spores 10 /i or more long 21 M. magnisporus 



Spores less than 10 ;i long 



Lamellae close 27 M. papillatus 



Lamellae distant 22 M. languidus 



Pileus not papillate 

 Lamellae broad 

 Stipe bulbous ; growing upon soil and 



buried twigs ; spores 7-9 (x long 23 M . v i a 1 i s 



Stipe increasing upward; growing 

 upon wood or other vegetable de- 

 bris ; spores 10-12 /jl long 21 M. magnisporus 



Lamellae narrow 



Lamellae and stipe with minute resin- 

 ous particles or hairs 24 M . r e s i n o s u s 



Lamellae and stipe without resinous 



particles or hairs 25 M. salignus 



Lamellae not decurrent 



Cystidia present 29 M. squamula 



Cystidia absent 



Spores irregularly angular 26 M. nigripes 



Spores not angular 



Odor strong 28 M. perforans 



Odor not strong 

 Stipe hollow, base swollen above and 



contracted to a point below 31 M. praeacutus 



Stipe of uniform thickness 



Stipe very short, upon herbaceous 



plants in swamps 3oM.caricicola 



Stipe not very short 



Pileus not distinctly striate or 

 plicate 



Stipe pallid 32 M. opacus 



Stipe becoming reddish 33 M . r a 11111 1 i n 11 s 



Pileus distinctly striate or pli- 

 cate 

 Lamellae narrow, adnexed. . 34 M . phyllophilus 



Lamellae broadly adnate 3.5 M . in s i ti tius 



Pileus not white 

 Lamellae decurrent 



Pileus yellow to ferruginous 36M.tomentosipea 



I Miens not yellow or ferruginous 

 Stipe glabrous above 3; M . a 1 ienus 



