218 THE AGARICACEAE OF MICHIGAN 



striate, farinaceo-atomaceous, white, then pale grayish-brown, 

 GILLS narrow, close, free. STEM 10-15 cm. high, slightly tapering 

 upward, fragile, hollow, white, the lower half clothed with loose 

 cottony flocci which rub off easily, upper half smooth or slightly 

 farinaceous. SPOKES 12.5 micr., broadly elliptical. Rich ground 

 and dung. 



This plant is frequently found on cow dung in woods and shaded 

 pastures. It resembles G. riiveus Fr. but differs from it in its 

 smaller size, free gills and constantly smaller spores. The spores 

 in both species are broadly elliptical and somewhat flattened. 

 This fungus grows readily from spores in laboratory cultures. 



202. Coprinus domesticus Fr. 



Fries, Epicr.. p. 251. 



Illustrations: Cooke. 111.. PI. 081. 



Gillet, Champignons de France, No. 176. 

 Plate XXXVIII of this Eeport. 



PILEUS, 3-5 cm. across, thin, ovate, then canipanulate, obtuse, 

 furfuraceous, squamulose. pale grayish-white, disk brown or red- 

 dish brown, undulate, sulcate, splitting. GILLS adnexed, crowded, 

 narrow at first, reddish white then blackish brown. STEM 5-7 cm. 

 long, 4-6 mm. thick, slightly attenuated upwards, subsilky, white, 

 hollow. SPORES 11-10 x7-8 micr. 



Usually caespitose, on various kinds of vegetable debris, some- 

 times in gardens where rubbish has been plowed under. 



Section Y. Micacei. Pileus at first covered with more or less 

 micaceous squainules or granules, which soon wholly or partly dis- 

 appear. 



203. Coprinus micaceus Fr. (Edible) 

 Fries, Epicr., p. 217. 



Illustrations: Cooke, 111.. PI. 073. 



Atkinson, Mushrooms, p. 44, Figs. 43, 44. 

 Murrill, Mycologia. Vol. 1, PI. 3, Fig. 5. 

 Hard, Mushrooms, Fig. 273. 

 Plates XXXIX and XL of this Report. 



PILEUS 4-0 cm. across, submembranaceous, elliptical then cam- 



