Genus Lepiota 329 



18. Stem solid; pileus 6-10 cm. broad I9 



18. Stem stuffed with fibrils or hollow 21 



19. Pileus pallid clay-color; annulus ample 20 



19. Pileus white, glabrous, margin even; stem subequal or subbulbous, 



5-10 cm. X 8-12 mm. ; taste and odor farinaceous, annulus large 

 then subevanescent, spores globose, 4-5 fj. L. solidipes Pk. 



20. Pileus diffracted-scaly, scales rather large; stem 5-7 cm. x 7-10 mm. • 



spores 8-9 x 6-7 fx; in cultivated gardens; southern states 



L. horlensis Murrill 



20. Pileus floccose-silky, glabrescent; stem 5-10 cm. x 10-12 mm., 



bulbous; spores 7-8 x 4-5 /jl; in frondose woods 



L. holosericea Fr.-Ricken 



21. Pileus colored rosy, pink, red or olive 22 



21. Pileus white or slightly isabelline on disk 25 



22. Pileus 4-7 cm. or 6-12 cm. broad 23 



22. Pileus 2-4 cm. broad, rose-lilac, livid on disk, minutely fibrillose- 



scaly; gills narrow; annulus sometimes mobile, ample; stem 

 7-10 cm. X 2.5 mm., slender; spores 8-9 x 4-5 fi L. roseilivida Murrill 



23. Pileus olive; spores 5-6 x 3-3.5 ix (See description.) L. olivacea, sp. nov. 



23. Pileus pinkish to red, subglabrous, radially rimose, annulus ample; 



fixed, membranous; stem equal or attenuate upward 24 



24. Spores 8-10 x 4-5 fj.; stem 4-9 cm. x 4-6 (8) mm L. rubrotincta Pk. 



24. Spores 7 x 3.5 fx; stem 10-15 cm. x 5-10 mm. ..L. rubrotinctoides Murrill 



24. Spores 5-7.5 x 3-4.5 /x; pileus 6-12 cm. broad; stem peronate by a 



red, glabrous sheath up to the ample, flaring, thickish annulus. 

 (L. pulcherrinia Zeller) . . . L. decorata Zeller (non L. pulcherrima Graff) 



25. Pileus 4-8 (9) cm. broad 26 



25. Pileus 2-4 cm. broad, finely fibrillose-scaly; gills narrow; stem 



5-10 cm. long, 3-5 mm. thick; annulus persistent; spores 7-9 x 

 3.5-4 /x L. Sequoiarum Murrill 



26. Pileus abruptly umbonate, plicate-sulcate on margin; gills narrow, 



remote; stem 7-10 cm. long, tapering upward from a bulbous 

 base, 5-8 mm. at base; annulus thin, spores 7-9 x 5-6 fx 



L. " mastoidea" Morgan 

 26. Pileus convex, not umbonate, white, glabrous; gills changing slowly 

 to dingy pinkish at maturity; stem 5-10 cm. x 6-12 mm., taper- 

 ing upwards from a thickened base; annulus in form of a rounded 

 collar; spores 7-9 x 5-6 fx L. naucina Ft. 



New and Emended Species of Lepiota * 

 Lepiota olivacea, sp. nov. (Plate XV) 



Pileus fleshy, fragile, 4-7 cm. broad, campanulate-expanded, 

 soon plane or depressed, sometimes subumbonate, dry, cuticle 



* The type specimens are deposited in the Herbarium of the University 

 of Michigan. 



