820 THE AGARICACEAE OF MICHIGAN 



**Gills broad, distant. 



878. Omphalia albidula Pk. 

 N. Y. State Mus. Eep. 49, 1S96. 



PILEUS 3-8 mm. broad, convex-hemispherical, at times papillate, 

 with or without an umbilicus, glabrous, striatulate. at first pure 

 white, then dingy. FLESH membranaceous. GILLS decurrent, 

 distant, broad, white, then dingy. STEM very slender, 1-4 cm. 

 long, .5 mm. thick, toughish, glabrous above, white, "solid," attached 

 below to leaves, etc., by a very strigose base. SPORES 8-10 x 2-4 

 micr., elongated-oblong, on slender sterigmata, 4-5 rnicr. long, 

 smooth, white. 



On leaves and bark in frondose or mixed woods. Bay View. 

 July. Rare. 



Related to O. stellata Fr. which differs mainly in its fragile stem, 

 diaphanous pileus and different spores. 0. papillata Pk. seems to 

 be very similar, but with a conic or campanulate cap, few gills and 

 different spores; it is said to be pure white. 



Section II. Mycenariae. Margin of pileus at first straight, 

 appressed to stem. 



879. Omphalia gracillima Fr. 



Epicrisis, 1836. 



Illustrations : Fries, Icones, PI. 75, Fig. 5. 

 Cooke, 111., PI. 252. 



Gillet, Champignons de France, No. 502. 

 Plate CLXXI of this Report. 



PILEUS 3-10 mm. broad, at first campanulate, becoming hemi- 

 spherical, sometimes papillate, sometimes depressed, snowy-white, 

 pellucid-striate, soon sulcate, glabrous, subHocculose when dry. 

 fragile. FLESH membranaceous. GILLS decurrent, triangular, 

 broad, subdistant to distant, thin, pure white, edge fimbriate. 

 STEM filiform, 2-5 cm. long, .5 mm. thick, equal, tubular, minutely 

 subpruinose, white like pileus, toughish, flaccid, attached by fioc- 

 cose base or almost inserted. SPORES 0-8 x 3-4 micr., oval-lance- 

 olate, apiculate, smooth, white. CYSTIDIA and sterile cells none. 

 BASIDIA 24x6 micr., 4-spored. 



