446 THE AGARICACEAE OF MICHIGAN 



(ccc) Pileus neither scaly, nor riniose, but persistently silky or 

 fibrillose. 

 (d) Pileus violaceous-lilac. 491. I. Ulacina Pat. 

 (dd) Pileus some other color. 



(e) Pileus small, 1-2.5 cm. broad, 

 (f) Pileus and stem white, glossy-shining. 490. I. geophylla 



Fr. 

 (ft') Pileus and slender stem rufous; in wet places. 492. 

 /. scabella Fr. var. rufa. 

 (ee) Pileus larger, 2-6 cm. broad. 



(f) Pileus whitish to straw-color or tinged ochraceous, 



woolly-fibrillose; stem white. 488. I. sindonia Fr. 

 (ff) Pileus ochraceous or ochraceous-yellow, fibrillose-sub- 

 scaly; stem pale ochraceous in age. 489. I. subochra- 

 cea Pk. 

 (aa) Cystidia lacking on sides of gills; edge of gills provided with 

 sac-shaped sterile cells, 

 (b) Pileus when fresh squarrose-scaly or floccose-warty ; stem 

 sheathed by floccose or fibrillose scales, 

 (c) Gills purplish-red; pileus smoky-brown, stem blood-red within; 

 mostly in gardens and greenhouses. (See 236. Psalliota 

 echinata.) 

 (cc) Gills not red. 



(d) Stem dark greenish-blue towards base; pileus coffee-brown 



to wood-brown. 465. /. calamistrata Fr. 

 (dd) Stem and pileus fulvous-yellowish or ochraceous; stem at 

 length tubular. 466. I. caesariata Fr. 

 (bb) Pileus not squarrose-scaly. 

 (c) Pileus appressed-scaly. 

 (d) Pileus large, 3-8 cm., smoky-purple, tinged wine-color, broadly 



umbonate. 475. I. frumentacea (Fr.) Bres. 

 (dd) Pileus olivaceous-fulvous; gills at first olive or fawn-yel- 

 low; flesh citron-yellowish; cortinate; spores 10-11x5.5-6.5 

 micr. I. dulcamera Schw. 

 (cc) Pileus at length rimose, fibrillose or subglabrous. 



(d) Pileus smoky-purple, vinaceous, conico-campanulate. 475. 



/. frumentacea Bres. var. jurana Pat. 

 (dd) Pileus not purplish, 

 (e) Pileus whitish, tawny, ochraceous or yellowish. 



(f) Center of pileus covered with white hoary-silky fibrils, 



convex and obtuse. 481. I. lanatodisca sp. nov. 

 (ff) Not hoary-silky. 



(g) Spores 9-12x5-6 micr.; pileus conic-campanulate, 

 pheasant-yellow to ochraceous-tan, virgate. 478. I. 

 fastigiata Bres. 

 (gg) Spores smaller. 



(h) Pileus pale yellow to straw color, lutescent; stem 



lutescent. 480. I. cookei Bres. 

 (hh) Pileus ochraceous to tawny-yellowish, gibbous; 

 stem irregularly clavate. 479. I. curreyi Berk, 

 (ee) Pileus some shade of brown. 



(f) Pileus glabrous, sublubricous on umbo, sordid livid- 

 brown, putrescent. 494. I. glaber sp. nov. 

 (ff) Pileus fibrillose-virgate and very rimose, brown; spores 

 7-9x5-6 micr. 476. I. rimosa Fr. (Sense of Ricken.) 



