ANALYSIS OF SPECIES. 



Spores and mature gills flesh-colored I 



Spores and mature gills rosy-red 9 



Spores very pale flesh-colored IO 



i . Pileus hygrophanous 8 



i . Pileus not hygrophanous 2 



2 . Pileus gray or grayish-brown 5 



2 . Pileus some other color 3 



3. Pileus white or whitish 4 



3. Pileus pale tan-color C. pascuensis 



4. Pileus firm, dry, pruinate C. prunulus 



4. Pileus soft, slightly viscid when moist C. Orcella 



5 . Pileus large, more than 1.5 in. broad C. abortivus 



5 . Pileus small, less than 1.5 in. broad 6 



6. Spores even C. unitinctus 



6. Spores angular 7 



7. Stem longer than the width of the zoneless pileus. . . C. albogriseus 

 7. Stem shorter than the width of the commonly zonate 



pileus C. micropus 



8. Pileus brown or grayish-brown C. subvilis 



8. Pileus white or yellowish-white C. Woodianus 



9. Stem colored like the pileus C. erythrosporus 



9. Stem white, paler than the pileus C. conissans 



10. Pileus even 1 1 



10. Pileus rivulose C. Noveboracensis 



1 1 . Stems cespitose, solid C. caespitosus 



1 1 . Stems not cespitose, hollow C. Seymourianus 



Peck, 42d Rep. N. Y. State Bot. 



SPORES FLESH-COLOR. 



A. SPORES EVEN. 



C. prn'imlns Scop. prunus, plum. (Plate LXIII, fig. 4, 5, p. 2 5 4.) 

 Pileus fleshy, compact, at first convex and regular, then repand, dry, 

 pruinate, white or ashy-white. Flesh white, unchangeable, with a 

 pleasant farinaceous odor. Gills deeply decurrent, subdistant, flesh- 



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