CLASSIFICATION OF AGARK 301 



853. Mycena polygramma I'r. 



Epicrisis, 1836. 



Illustrations : Cooke, III.. PI. 223. 



.Michael. Fuhrer t. Pilzfreunde, 1 1 1. No. 91. 



Var. albida Kami. .Mich. Acad. Sci. Rep. 13. p. 219. 



I'll, Ill's 2-5 cm. broad, cnrapauulate or conic-campanulnte, 

 obtuselj subnmbonate, sulcatt striatt on margin in large Rp< 

 mens, white, whitish-buff or -ravish, glabrous, ntnmate when dry. 

 PLESH while, i hin. GILLS tiarroicly adnaU . not uncinaU . as< end 

 ing or arcuate, father broad in middle, subdistant, while, with a 

 faint flnsh of pink in the gray forms, edge even. STEM 5 10 cm. 

 long, 2 I nun. thick, equal, cartilaginous, hollow, 8triatu1at( or 

 distinctly striatt <ii apex or throughout, sometimes twisted, straight 

 or Hexuous, firm and rather rigid but fragile, glabrous and shining, 

 while or grayish-white, hairy at base. SPORES s 10x5-6 micr., 

 broadly elliptical, ends rounded, smooth, white. CYSTIDIA fusi 

 form-acuminate, abundant, 15-75x9-15 micr. BASIDIA l-spored, 

 sterigmata slender. ODOE nitrous, varying from slighl to strong. 



Caespitose, gregarious or solitary i>n decaying logs of maple, 

 elm, basswood, etc; Ann Arbor. Slay-June. Frequenl locally. 



So1 to be confounded with I/, alkalina, which lacks cystidia or 

 possesses I m i a few of them, ami which has pseudo-viscid Btems. 

 The typical .1/. polygramma of Europe has not been recognized with 

 certainty ami appears to be rare. Atkinson has referred '/. /* 

 longa Pk. to it. but the latter is kepi intacl in this report. Our 

 plants, described above, are relatively large, almosl pure white ami 

 have striate stems ami a nitrous odor. It cannol be I/, iitdora Pi 



since the cap is not viscid. 



854. Mycena lasiosperma Bres. 



Puug. Trid., L881. 



I (lustration : I bid, PI. 37, Pig. I. 



PILEUS 5-20 mm. broad, conic-campanulate 'hen expauded-um 

 bonate, subviscid, striatulate to ninbo, subhygrophauous, </</</. i 

 ereous, almosl black <>n ambo, paler toward margin. PLESH thin, 

 con color. GILLS adnexed, with tooth, close, ventricose, whitish 



101 



