4 g4 THE AGARICACEAE OF MICHIGAN 



importanl for the diagnosis of species, because of the considerable 

 difference in the color. CYSTIDIA are present and rather abund- 

 ant (,ii the sides and edge of the gills. The ODOR is an important 

 character and was frequently employed by Fries, especially in the 

 VIonographia, to separate the species. The TASTE is often bitter, 

 sometimes strong, and tends to turn away the searcher who is after 

 edible mushrooms. 



The species are Dot ye1 well understood, especially in this country. 

 Peck has described some twenty-five species but most of these are 

 poorly known. Only about half of my different collections have 

 been included here since the rest are still doubtfully determined. 

 I'm species seem to be common at least in the southern part of the 

 siate but it is likely that more species occur in the north during 

 favorable seasons. 



Key to the Species 



(A) Pileus dry, golden-tawny, minutely floccose-scaly ; gills chrome- 

 yellow. 519. F. sapinea Pr. 

 (AA) Pileus glutinous, viscid, subviscid or moist, 

 (a) Gills grayish to olive-purplish-fuscous; pileus glutinous, with 



superficial scales. 511. F. polychroa Berk, 

 (aa) Gills without gray or purple tints. 

 (b) Pileus 6-12 cm. or more broad, viscid, flesh white. 512. F. 



lubrica Fr. 

 (bb) Pileus 3-8 cm. broad, glutinous; flesh white. 513. F. lenta Fr. 

 (bbb) Pileus 2-7 cm. broad; flesh yellowish, 

 (c) Gills smoky-brown to fuscous-brown; pileus not truly yellow- 



514. F. ca?~bonaria Fr. var. 

 (cc) Gills yellow or pallid-ochraceous. 

 (d) Pileus. with viscid or glutinous separable pellicle, 

 (e) Pileus sulphur-yellow, with fulvous center; stem slender; 



flesh thin. 515. F. spumosa Fr. 

 (ee) Pileus pale ochraceous-olivaceous-buff ; flesh thick. 517. 

 F. gummosa Fr. 

 (dd) Pileus without a viscid pellicle, 

 (e) Odor strong, bitter; pileus pale, cadmium-yellow, lubri- 

 cous; stem elongated. 518. F. alnicola Fr. 

 (ee) Odor slight or none; pileus bright yellow, glabrous, mar- 

 gin cortinate. 516. F. flavida Fr. 



Hon I. Phaeotae. Spore mass sordid brown. Pileus with a 



mure or less viseid or glutinous, separable pellicle. 



511. Flammula polychroa Berk. 



Lea's Catalog, Plants. Cinn. 1844. 



Illustrations: Atkinson, Mushrooms, Fig. 147, p. 150, 1900. 

 Moffatt, Chicago, Nat. Hist. Surv.. Bull. No. VII, Part I, PL 

 L0, Figs. L-2, 1!)09. 



