Jan. 19 J7] North American Species of Lepiota 15 



REMAINS ATTACHED TO THE STIPE AS A RING OR 

 AS A SHEATH RUNNING DOWN ITS SURFACE OR 

 SOMETIMES PORTIONS OF IT FORM A FRINGE OR 

 APPENDAGE TO THE MARGIN OF THE PI LEU S. 



I. MESOMORPHAE. Dermis of the piletis entire, the 

 surface of both pileiis and stipe smooth and glabrous; the veil 

 ■annulate, often evanescent . . Species : 1-2 



II. EUCONIATI. Dermis of the pileus not lacerate, but 

 the surface pruinose, finely pulverulent or minutely ftirfuraceous; 

 the investment of the stipe usually similar to that of the pileus; 

 the veil often appendiculate. 



A. STIPE GLABROUS Species: 3 



B. STIPE PULVERULENT OR MINUTELY FUR- 

 FURACEOUS Species: 4-12 



III. GRANULOSAE. Dermis of the pileus or at least its 

 outer layer composed of granules, minute luarts or furfuraceous 

 particles; the investment of the stipe similar to that of the pileus; 

 the iml of like structure, lacerate and appendiculate. 



a. Lamellae adnate to the stipe. . . . Species : 13-16 



b. Lamellae free from the stipe or merely reaching it. 



Species : 17-20 



IV. CLYPEOLARIAE. Dermis of the pileus a thin mem- 

 brane, radiately Hbrillose, the cuticle at first continuous but 

 sooner or later broken up and drawn apart by the groivth of the 

 pileus, this at length presenting a ivhite-fibrillose surface sprinkled 

 zuith colored scales; the veil lacerate, part of it appendicidate, 

 continuous dozvnzvard zvith the fioccose-fibrillose investment of 

 the stipe Species: 21-28 



V. ASPERAE. Dermis of the pileus or at least its su- 

 perficial layer Hbrillose-scaly from the first^ the scales reflexed 

 and squarrose or the fibres fascicidate and convergent into pointed 

 zvarts; the veil and the cuticle of the stipe may be of similar 

 texture or the stipe may be nearly glabrous. . Species : 29-35 



VI. GLIODORMATAE. Dermis of the pileus continuous, 

 never separating into scales, but the surface invested by a more 

 or less thickened layer of gluten, pellucid or colored. Stipe 

 commonly dry and squamtdose or subglabrous, in a fezv species 

 with a viscid cuticle like the pileus Species : 36-41 



§ 2. ANN U LI MOBILES. THE VEIL IN THIS SEC- 

 TION IS MARGINAL AND INFERIOR AS IN THE FIRST 

 SECTION. BUT THE DERMIS OF THE PILEUS AND 

 THAT OF THE STIPE ARE DISSIMILAR, THE COL- 



