148 NORTH AMERICAN FLORA [Volume 10 
Paxillus simulans Peck, Bull. N. V. State Mus. 12: 30. 1887. Described from specimens 
collected in thin woods at Sandlake, New York. ‘There are two hymenophores on the type 
sheet at Albany and they are apparently a whitish species of Lactaria or Russula. Peck re- 
marks that no latex was observed. 
64. CREPIDOTUS (Fries) Quél. Champ. Jura Vosg. 106. 1872. 
Agaricus § Crepidotus Fries, Syst. Myc. 1: 272. 1821. 
Phialocybe P, Karst. Bidr. Finl. Nat. Folk 32: 415. 1879. 
Derminus Schroet. Krypt-Fl. Schles. 31: 578. 1889. 
Pileus soft, fleshy, putrescent, irregular, often dimidiate or resupinate; lamellae usually 
radiating from a lateral point; spores ochraceous, ferruginous, or fulvous; stipe lateral or 
wanting, rarely eccentric; veil none. 
Type species, Crepidotus mollis (Schaeff.) Quél. 
I. SPECIES OCCURRING IN TEMPERATE NorTH AMERICA, EXCEPT THOSE CONFINED TO THE 
Pacific COAST 
Pileus white, whitish, or grayish-white. 
Pileus 3-10 mm. broad. 
Spores globose, 5~6 y. 1. C, latifolius. 
Spores ellipsoid. 
Surface glabrous. 2. C. albidus. 
Surface downy-villose. 3. C. herbarum. 
Pileus 1-2 cm. broad, sometimes smaller in C. versutus. 
Pileus striate on the margin. 
Spores globose. 
Lamellae very narrow, crowded. 4. C. applanatus. 
Lamellae broad, not crowded. 5. C. hygrophanus. 
Spores ellipsoid. 6. C. haerens, 
Pileus not striate on the margin; spores ellipsoid. 
Pileus glabrous or becoming glabrous. ‘ 
Lamellae whitish on the edges. 7. C. fraxinicola. 
Lamellae concolorous on the edges. 8. C. alabamensis. 
Pileus villose. 
Pileus at first resupinate; spores 8.5-10 X 6-7.5 y. 9. C. versutus, 
Pileus not at first resupinate; spores 7-8 X 4-6 u. 10. C. Betulae. 
Pileus 2-8 cm. broad. 
Surface tomentose. 11. C. putrigenus, 
Surface glabrous. 
Spores globose. 12. C. malachius. 
Spores ellipsoid. 13. C. mollis. 
Pileus yellowish, ochraceous, fulvous, or grayish-fulvous. 
Pileus 4-8 mm. broad. 
Pileus ochraceous, tomentose, 4 mm. broad. 14. C. pecten. 
Pileus fulvous or grayish-fulvous, usually larger. 
Surface sulcate-striate, minutely pubescent. 15. C. distans. 
Surface not striate, minutely squamulose. 16. C. sepiarius. 
Pileus 1-5 em. broad. 
Surface glabrous, yellowish. 17. C. croceitinctus. 
Surface tomentose, yellowish. 18. C. nephrodes. 
Surface squamulose. 
Lamellae orange-colored when young. 19. C. crocophyllus. 
Lamellae white or whitish when young. 
Spores globose, 4—5 u. 20, C. fulvifibrillosus. 
Spores ellipsoid, 8-9 X 5-6 yp. 21. C. calolepis. 
Pileus watery-brown and striate when moist, dingy-buff when dry; stipitate. 22. C. tiliophilus. 
Pileus ferruginous-orange, squamulose. 23. C. flammeus. 
Pileus reddish-yellow. 24. C. rubriflavus. 
Pileus red. 
Pileus 2-4 mm. broad, glabrous. 25. C. rufolatericius. 
Pileus 6-15 mm. broad, pulverulent. 26. C. cinnabarinus. 
II. SPECIES OCCURRING ON THE PacrFIC coast 
Pileus 4-10 mm. broad. 
Pileus white. 3. C. herbarum., 
Pileus brown. 27. C. puberulus. 
Pileus 2-8 cm. broad. 
Pileus white or whitish, glabrous or nearly so. 
Spores globose. 12. C. malachius. 
Spores ellipsoid. 
Surface radially sulcate or plicate. 28. C. submollis. 
Surface not as above. 13. C. mollis. 
Pileus fulvous, squamulose. 21. C. calolepis. 
