SI BSECTlOh HYGROCYB1 l u 



11. Pileus 3—18 nun broad; lamellae coral red and not fading 



78. H. firmtu var. trmiteruis 



11. Pileus 10-50 nun broad; lamellae orange-yellow, or, ii red, soon Fading 



to orange or \ellow 12 



12. Filamentose cheilocystidia present; context of pileus thick and firm 

 82. //. squamtdostu 



12. Cheilocystidia absent 13 



13. Pileus red, fading to orange or pale yellow and then fibrillose-scurfy; 



basidia monomorphous 80. //. mmiahu var. miniatus 



13. Pileus red. not fading, silky; basidia dimorphous 



75. //. firmtu var. mUUaru 



14. Spores weakly amyloid 117. //. metapodhu 



14. Spores non-aim bid 15 



15. Spores 5-6(7) /a, subglobose; pleurocystidia and cheilocystidia present 



S3. //. suboomus 



15. Not as above 16 



16. Spores 5—6 X 3.5-4.5 ^ pileus blackish on disc, gills drab gray 

 with pallid margins 84. //. utro -olivaccus 



16. Not as above 17 



17. Lamellae tending to stain olivaceous where bruised; pileus chamois 



colored; odor sharp and fragrant 85. //. olivascens 



17. Not with above combination of characters 18 



18. Pileus dingy honey color or yellower; squamules often blackish at 

 tips; lamellae white becoming yellowish; spores 6-8 X 5-6 n . . . . 

 86. H. caespitosus 



18. Not with above combination of characters 19 



19. Context, lamellae, and or stipe becoming pinkish to brownish where 



bruised 20 



19. No part of fruiting body unchanging when bruised 21 



20. Odor distinctly nitrous 106. H. nitiosus 



20. Odor merely pungent 110. H. ovinus 



21. Odor nitrous (see H. tahquamenonensis, page 193) ... .87. H. nitratus 

 21. Odor not nitrous 22 



22. Spores 8-11 X 6-7 fx; lamellae white, taste mild . .88. H. erinensis 



22. Spores 6-9 X 3.5-5; lamellae brown; taste bitter-astringent 



89. H. cokcri 



70 



Hygrophorus purpureofolius Bigelow 



Rhodora 62: 190. 1960 



Illustrations: 

 Fig. 38. 

 Bigelow, Rhodora 62, pi. 1253. 



Pileus ( 0.7- ) 1-5 cm broad, conic or campanulate at first, umbo 

 obtuse and rather broad, margin incurved and slightly inrolled, not 

 striate, becoming convex to broadly convex, finally plane, margin 

 often somewhat undulate, surface opaque and dull watery-appearing, 



