408 THE AGARICACEAE OF MICHIGAN 



band-like annulus half-way or lower on the stem, or forming adnate 

 patches, concolorous, lavender within and soon cavernous from 

 grubs. CORTINA violaceous-white. SPORES elliptic-ovate, slight- 

 ly rough, 7-9 x 5-6 micr. BASIDIA 40 micr. long. 



Gregarious, often in troops or partial rings. In wet, swampy 

 places, frondose or mixed woods. Marquette, Houghton, Detroit. 

 July-September. Infrequent. 



This species is probably identical with one occurring in Europe. 

 I collected a very similar plant, with the same gregarious habit, 

 near Stockholm, Sweden, while in company with Romell, Maire 

 and Peltereux, who did not recognize it as a species definitely 

 known to them. It had the same spores, and all the characters of 

 the American plant except the less marked lavender color. I sus- 

 pect it is G. lucorum Fr. Two other collections from Sweden 

 brought to this country and labeled G. impennis Fr., the one de- 

 termined by Robert Fries with spores like G. umidicola, the other 

 determined by Romell, with spores measuring 11-12x6-7 micr., 

 seem to show that two similar species are being confused in Europe. 

 One of these corresponds to G. umidicola, and is well illustrated by 

 Gillet (Champignons de France, No. 228), the other is the true 

 G. impennis Fr. (Icones, PI. 157, Fig. 2). If this inference is 

 correct, then Ricken's description of G. impennis also applies to 

 the former species. The taste of the plants which I collected in 

 Sweden was like ours, not of radish. The unpublished plate of 

 G. lucorum Fr. in the museum at Stockholm represents a plant 

 very much like G. umidicola with several band-like rings on the 

 stem. Cooke's figure (PI. 1192, 111.) seems to belong elsewhere. 



415. Cortinarius scutulatus Fr. 

 Syst. Myc, 1821. 



Illustrations: Fries, Icones, PI. 158. 

 Cooke, 111., PI. 820. 



Gillet, Champignons de France, No. 249. 

 Ricken, Die Bliitterpilze, PI. 49, Fig. 1. 



PILEUS 2-4 cm. broad, at first subhemispherical and sometimes 

 gibbous, then campanula te, firm, brittle, hygrophanous, dark-pur- 

 plish-chestnut or smoky-violet-umber, unicolorous, becoming can- 

 escent with grayish-white innate fibrils, inflexed margin at first 

 silky. FLESH concolor under cuticle, soon whitish elsewhere. 



