THE AGARICACEAE OF MICHIGAN 

 598. Entoloma grayanum Pk. 



N. V. Stale .Mus. Rep. 24, 1872. 



Illustrations : Atkinson, Mushrooms, Fig. 157, p. 113, 1900. 

 Plate CVIII of this Report. 



PILEUS 4-12 cm. broad, campanulate-convex, then expanded and 

 obtuse or broadly umbonate, -firm, glabrous, hygrophanous, watery- 

 white, whitish or yellowish-white (moist), shining and whitish 

 (dry), not striate, sometimes wrinkled on disk. FLESH relatively 

 Hi in, whitish or tinged yellowish, scissile, not compact. GILLS 

 adnexed, becoming emarginate, at first rounded behind, broad, 

 ventricose, rather close, thickish, white then deep rlesh color, edge 

 entire or eroded-crisped. STEM 5-12 cm. long, 10-20 mm. thick, 

 equal or subequal, firm, stout, varioush" thickened, fibrous-stuffed, 

 solid at base, straight or curved, glabrous, silky-shining, watery- 

 white or tinged faintly with yellowish. SPORES sphoeroid, angu- 

 lar. 5-6 angled. 8-10 (incl. apiculus) x 7-9 mier., bright flesh color 

 in mass. CYSTIDIA and STERILE CELLS none. BASIDIA 

 clavate. 45x12 micr., 4-spored. ODOR and TASTE none or rarely 

 siibl'arinaceous to slightly pungent. 



i Dried: Pileus fuscous; stem sordid; gills dingy flesh-color, i 



Solitary or subcaespitose-gregarious. On the ground in woods. 

 August-October. Ann Arbor, Negaunee. 



Distinguished by its whitish or yellowish-white pileus which has 

 a watery cast, the hygrophanous hence scissile flesh, and the -spores. 

 1 1 is often a noble plant ami our forms surpass considerably the 

 sizes given by Peck. In fact its characters are in some respects 

 so near those of /;. grande Pk., that only its hygrophanous flesh and 

 thinner pileus seem to separate it. The spores are sharply angled 

 and the apiculus usually stands out straight instead of obliquely 

 as in many others. Atkinson (1900) describes a form with a drab- 

 colored pileus. In dry weather the yellowish hues may be alto- 

 gether lacking. 



