SI BSECTION IIYCROCYHI. I >/ 



Fig. 34. //. acutoides var. acutoides 



obtuse conic umbo, disc grayish brown to somewhat fuscous, in age 

 near "Saccardo's umber," margin pallid watery, surface viscid to 

 subviscid, soon dry, margin faintly striatulate in some. Context 

 watery-pallid, thin, when cut or bruised gradually changing to flesh 

 color; odor distinctly of fresh green corn, taste mild. 



Lamellae adnate but becoming adnexed, whitish to pallid and 

 slowly staining pale salmon color where bruised, subdistant, broad. 



Stipe 6-8 cm long, 4-6 mm at apex, white, in age or where bruised 

 staining pale salmon color, equal or slightly enlarged downward, solid, 

 white within, surface dry, naked, apex naked to silky. 



Spores 7-8 X 5-6 /*, broadly ellipsoid, smooth, hyaline, yellowish in 

 Melzer's solution. Basidia 38-46(54) X 8-9(11) p, 4-spored. Pleuro- 

 cystidia and cheilocvstidia not seen. Gill trama subparallel, hyaline in 

 KOH, hyphae 5-8 /x broad. Cuticle an ixocutis, consisting of a thin, 

 gelatinous zone (18-30 fx thick), the hyphae 3-5 ^i broad, colorless, 

 repent, radially disposed. No hypodermium. Pileus trama of radially 

 disposed hyphae. Clamp connections present. 



Habit, Habitat, and Distbibutiox — Gregarious to scattered on 

 humus, Michigan, August-October. 



Matebial Studied — Michigan: Thiers & Smith 35847 (type, from 

 Mackinaw City, Sept. 16, 1950); Smith 7645, 15523, 20546. 32013, 

 34139, 36074, 36131, 37898, 42960, 42997, 43540. 43974, 50597. 51028. 



