284 SECTION HYGROPHORUS 



3. Stipe showing a thin to conspicuous inner fibrillose veil beneath the 



glutinous outer veil 4 



3. Stipe lacking a fibrillose inner veil 9 



4. Inner veil white 5 



4. Inner veil colored 6 



5. Context and lamellae soon tinged or colored vellow; under pines 



164. H. hypothejus 



5. Growing under hardwoods; lamellae and stipe apex (squamules at 



least) finally stained olive 172. H. paludosus 



5. Stipe white and unchanging; pileus fuscous 



173. H. fuscoalhus var. fuscoalbus 



6. Hyphae of the epicutis of the pileus with dark yellow-brown granules 

 as observed in Melzer's reagent . . 177. H. olivaceoalbus var. gracilis 



6. Not as above 7 



7. Spores 10-16 X 6-9 /x; inner veil rudimentary 174. H. limacinus 



7. Spores 8—12 /x long; inner veil well-developed 8 



8. Inner veil thin 176. H. olivaceoalbus var. intermedins 



8. Inner veil copious 175. H. olivaceoalbus var. olivaceoalbus 



9. Clamp connections absent on hyphae of fruiting bodv; spores 9-12 X 



5-6.5 ix 178. H. adiaphorus 



9. Clamp connections present 10 



10. Spores 12-18(20) X 7-9 M 179. H. megasporus 



10. Spores smaller 11 



11. Ornamentation over upper portion of stipe white, and unchanging in 



age or when bruised 12 



11. Ornamentation colored or becoming so 15 



12. Pileus whitish with a brownish disc, and minutelv virgate with 



innate black fibrils 160. H. virgatulus 



12. Pileus not as above 13 



13. Pileus uniformly olive-black to blackish 182. H. fuligineus 



13. Pileus disc and margin colors not uniform 14 



14. Pileus margin whitish, disc gray to brownish grav 



180. H. occidentalis 



14. Pileus margin cinereous to "tilleul buff," disc pale drab to avellane- 



ous 181. H. mesotephrus 



15. Squamules at apex of stipe golden yellow, finally cinereous 



184. H. tephroleucus var. aureofloccosus 



15. Not as above 16 



16. Stipe 2-3(4) mm thick, white at first, surface fibrils and punctae 



cinerescent 183. H. tephroleucus var. tephroleucus 



16. Stipe thicker 17 



17. Stipe 5-8 mm thick; with dark gray, coispkuous punctae near the apex 



185. H. pustulatus 



17. Stipe 11-20 mm thick; apex silky-floccose, becoming orange-brown 

 punctate when dried, in KOH becoming instantly orange; no inner 

 fibrillose veil 186. H. paludosoides 



