( ,|s THE AGARICACEAE OF MICHIGAN 



Ricken, Blatterpilze, PL 80 7 Fig. 1. 



Atkinson, Mushrooms, Plates 19, 20, and Fig. 73, 1900. 



Hard. Mushrooms, Fig. 27, 1908. 



Plate CXXI of this Report. 



PILEUS 5-12 cm. broad, oval at first, then broadly convex or 

 campanulate, sometimes expanded, obtuse, subviscid when moist, 

 pale broicnish-buff to sordid reddish-brown, covered with floccose 

 masses or soft warts which are whitish, grayish or reddish-stained, 

 margin even or obscurely striatulate. FLESH soft, thin, whitish, 

 becoming reddish-stained when bruised or in age. GILLS narrowed 

 toward stem and free, moderately broad in front, close, white or 

 whitish, edge pulverulent under lens. STEM 10-20 cm. long, 8-15 

 mm. thick, subcylindrical above, clavate-bulbous to rounded-bulbous 

 below, stuffed, subglabrous, even or the apex slightly striate and 

 mealy, pink-tinged within and without, dull red where bruised. 

 ANNULUS broad, superior, membranous, fragile, often striate on 

 the upper side. VOLVA mostly lacking, evanescent, grayish. 

 SPORES elliptical, 7-9x6 micr., when mature (immature plants 

 shedding smaller spores), smooth, white. 



Solitary or scattered. In oak and maple woods of southern 

 Michigan, mixed woods of conifer regions; it seems to prefer clay 

 soil. Especially common in open or pastured woods. Throughout 

 the State. July to September, far more common in July. Edible. 



The color is quite variable, soon tinged with the reddish stains 

 which separate this species from all others except A. flavorubescens. 

 When fresh the flesh turns red rapidly where bruised. The stem has 

 a rather hard cortex in dry weather which cracks across and peels 

 in part. Sometimes there are minute, reddish or tawny scales on 

 the stem. The spores are 1 to 2 micr. shorter than in the European 

 plant as shown in specimens I have from Sweden, and by the 

 measurements given by Boudier. Cooke in the Illustrations refers 

 to shorter spores, so that they were probably immature. It is easy 

 to find expanded specimens whose spores are not fully developed. 

 The annulus is usually large and pendant. It is edible, but one 

 iiiusi be extremely careful. 



