HOW TO USE THE KEY 



dL Cap 



/^ Cap, Character of — Brittle, coriaceous (leathery) ; downy or 

 hairy (fioccose, tomentose) (78); fragile; sticky when moist 

 (viscid); tough; scaly, i.e., with scales or warts on the surface 

 (81); water-soaked in appearance when moist, changing to 

 opaque and often of different color when dry (hygrophanous) ; 

 silky. 



"^ Cap, Color of — While some shade of tan or brown is the 

 commonest color of gilled mushrooms, there is scarcely any 

 color that does not occur among them. 



^ Cap, form of — Attached to wood by its top (resupinate) 

 (48, at right); bell-shaped (campanulate even when mature) 

 (95); cone-shaped or conic (59); inverted cone-shaped (ob- 

 conic) (22); cylindrical (38, Frontispiece); with edge turned up 

 (revolute) (32); funnel-shaped (infundibuliform) (26); with 

 edge turned downward and inward (involute) (100); fleshy 

 (flesh is the portion between the upper surface of the cap and 

 its lower surface to which the gills are attached) (2); thin 

 (ill); membranous (with little or no flesh; kidney-shaped 

 (reniform) (47); with a knob protruding from the center 

 (umbonate) (15); lobed at the edge (13); nippled (a nipple- 

 like elevation at the center; notched at the edge (81); with a 

 pit or small depression at the center (umbilicate) (93); with 

 radiating marks or furrows near the edge (striatulate or 

 striate) (116); split at the edge (5); with fragments of the 

 veil attached to the edge of the cap (97) ; with a wavy edge (12) ; 

 smooth; scaly (squamose or squamulose) (38, Frontispiece). 



V> Cap, Size of — Large (four or more inches in diameter; 

 medium (one to four inches in diameter) ; small (less than one 

 inch in diameter). 



/|[ GiUs 

 /^ Gills, Character of — Brittle; liquefying (deliquescing) when 

 old (38, frontispiece); separable easily from the cap; with 



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