GENERA AND SPECIES OF MUSHROOMS 



One of the most common and widely distributed species of 

 the genus Omphalia. It is often clustered, large numbers 

 covering a considerable surface of the decaying log. Atkinson. 



It is easily recognized by its yellowish-red cap, dark-brown 

 stem and the little tuft of tawny colored hairs at the base of the 

 stem. Peck. 



Omphalia fibula. Plate XII, Species 94. 



On mossy ground in fields and groves; June to October. 



Cap thin; with a pit or depression at the center (umbilicate) ; 

 smooth; with slight radial lines at the margin (striatulate) ; 

 yellow or pale orange; ^/s to }^ inch broad. 



Gills narrow; arched; extending well down the stem (decur- 

 rent); whitish. 



Stem long and slender; smooth; hollow; colored like the 

 cap; I to 2 inches long. 



Spores white; somewhat elliptical; smooth; 4-6 x 2-3 

 microns in diameter. 



The cap becomes brighter in color on drying. 



The genus Panaeolus 



In the black-spored genus Panaeolus, the cap is somewhat 

 fleshy or thin; the margin without radial lines or striations. 

 The gills do not extend as far as the margin of the cap and are 

 often mottled or spotted with black or brown and with white 

 edges. The veil extending from the margin of the cap to the 

 stem is often well marked, especially in young plants belonging 

 to this genus. It sometimes persists in the form of fragments 

 hanging from the margin of the cap. Peck. 



Species of this genus usually occur in manure or rich soil 

 in open places. P. papilionaceus and P. retirugis are said to 

 produce hilarity and a mild form of intoxication in man if 

 eaten in quantity. Ford found the latter species poisonous to 

 guinea pigs. A century ago P. campanulatus was reported 



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