tll _, THE AGARICACEAE OF MICHIGAN 



An effort was made by Morgan (Jour, of Mycol., Vol. 12, p. 244, 

 1906), to separate this into two species, C. cristata Fr. and 

 C. angustana Britz. The separation was based on the spores and 

 odor. Our plants sometimes have angular spores and no odor, and 

 the spores vary, even in the same plant. Atkinson (Mushrooms, 

 1900, p. 92) has already pointed out that they are identical. The 

 odor seems to be strong, weak or absent under different conditions. 

 The pileus may be as much as 5 cm. across. 



683. Lepiota alluviinus Pk. 

 N. Y. State Mus. Rep. 35, p. 157, 1881. 



"PILEUS 1-3 cm. broad, thin, convex or plane, sometimes re- 

 flexed on margin, white, adorned with minute pale-yellow hairy or 

 fibrillose scales. GILLS free, thin, close, white or yellowish. 

 STEM 2-4 cm. long, 2-3 mm. thick, slender, fibrillose, whit- 

 ish or pallid, slightly thickened at the base. ANNULUS slight, 

 subpersistent, often near themiddle of the stein. SPORES ellipti- 

 cal, 6-7.5 x 4-5 micr." 



Alluvial soil among weeds and shrubs. East Lansing. August. 

 Reported by Longyear. 



"In drying the whole plant assumes a rich yellow hue." 



684. Lepiota miamensis Morg. 

 Jour. Cincinnati Soc. Nat. Hist., 1883. 



PILEUS 2-4 cm. broad, soft, convex-expanded, subumbonate, 

 even, fibrillose-scaly except disk, white, disk sometimes brownish. 

 FLESH white, very thin, fragile. GILLS free, rather broad, round- 

 ed behind, ventricose, ivhite. STEM 3-5 cm. long, 2-4 mm. thick, 

 slender, hollow, subequal, glabrous or pruinose at apex, often com- 

 pressed, white. ANNULUS thin, fragile, subpersistent, median. 

 SPORES oblong-oval, 5-6x3-3.5 micr., white. 



(Dried: Pileus whitish, with brownish center, gills dingy-white, 

 stem pallid.) 



Singly or few. On the ground in rich woods among leaves. Ann 

 Arbor. September. Rarely found. 



Apparently similar to L. alluviinus, differing in lack of yellow 

 color, especially on drying, and rather broad gills. 



*r 



