The veiled species of Hebeloma in the western United States / Alexander H. Smith, Vera Stucky Evenson, and Duane H. Mitchel.

116 The Veiled Species of Hebeloma
2. Not as above.................................................. 3
3. Stipe 1.5-2.5 mm thick; fragile; becoming dark brown where handled......................................................... 63. H. fuscostip es
3. Not as above..................................................... 4
4. Stipe with a basal pad of pinkish buff mycelium; some of the
cheilocystidia up to 20 pxm wide..................... 64. H. subumbrinum
4. Not as above.......................................... 5
5. Spores 9-12 mm long........................................ 6
5. Spores 10-15 pIm or more long........................................ 12
6. Odor and taste mild or odor weakly pungent........................... 7
6. Odor and taste raphanoid............................................ 9
7. Veil whitish............................ 65. H. occidentale and 66. H. hesleri
7. Veil grayish..........................................................8
8. Odor pungent; cuticle of pileus of hyphae many of which have
very fine incrustations.................................. 67. H. obscurum
8. Odor mild; cuticular hyphae smooth.................. 68. H. griseovelatum
9. Pileus grayish brown ("Wood Brown")................. 69. H. piceicola
9. Not as above........................................ 10
10. Pileus dull orange-cinnamon; gills distant........................... see 60. H. pseudofastibile var. distans (p. 114)
10. Not as above............................................... 11
11. Pileus pinkish tan to clay color; gills close.................................... 70. H. pseudofastibile var. pseudofastibile
11. Not as above.............................................. 12
12. Taste radishlike; odor slight to none.................................. 13
12. Taste mild; odor + pungent to lacking................................ 16
13. Hypodermium cellular....................................... 71. H. remyi
13. Hypodermium hyphoid to intermediate................................... 14
14. Stipe readily splitting lengthwise........... 72a. H. marginatulum var. fallax
14. Stipe not readily splitting...........................................15
15. Veil thin, lacking a distinct color tint.... 72. H. marginatulum var. marginatulum
15. Veil grayish buff............. 72b. H. marginatulum var. proximum nom. prov.
16. Hypodermium cellular......................................... 17
16. Hypodermium hyphoid to intermediate.............................. 19
17. Cuticle an ixotrichodermium....................... 73. H. insigne
17. Cuticle an ixocutis...................................................... 18
18. Stipe 3-5 mm diam (see also 67. H. obscurum)............ 74. H. kuehneri
18. Stipe 15-30 mm thick............................ 75. H. wells-kemptonae
19. Stipe readily splitting lengthwise......................... 76. H. subrubescens
19. Stipe not as above, + covered with scattered patches of a buff veil........................................................ 77. H. pallescens
61. Hebeloma corrugatum sp. nov.
Pileus 3-4 cm latus, late convexus demum subplanus, canescens,
subviscidus, obscure luteobrunneus, ad marginem brunneogriseus, demum corrugatus. Odor et gustus mitis. Lamellae latae, ventricosae,
pallidae demum brunneae. Stipes 6-8 cm longus, 2.5-4 mm crassus,
deorsum demum obscure fulvus. Velum argillaceum, fibrillosum.
Sporae 11-14.5 x 7-8 pJm, tarde dextrinoideae, limoniformes. Chei