190 



AGARICACE^: 



Psathyra: 



XXXVIII. PSATHYRA Quel. 

 (From the friable substance ; Gr. psathuros, friable.) 



Veil when present universal, floccoso-fibrillose, not annulate, 

 sometimes obsolete. Hymenophore confluent with, but heterogeneous 

 from the cartilaginous stem. Pileus conical or campanulate, then- 

 expanded, submembranous, margin at first straight and adpressed to- 



A 



Fig. 47. A, section of Psathyra conopilea Quel. ; 



B, P. bifrons Sacc. entire and in section. 



One-half natural size. 



the stem, except 884. Stem central, somewhat cartilaginous, fistulose,. 

 lustrous, fragile, simple. Gills at first pale, becoming purple or 

 fuscous. Spores purple, brownish-purple, dark purple or dark brown. 

 (Fig. 47-) 



The species grow on the ground, or on rotten wood, they are 

 slender, fragile, hygrophanous and with fugitive colouring. 



Psathyra agrees in structure with Mycena, Nolanea, Galera and 

 Psathyrella. Species 872 893 



a. Conopilecc. Veil obsolete. Pileus conico-campanulate. Stem 



tense and straight, fistulose. Gills usually adnexo- 

 ascending, often free. On the ground in grassy or damp 

 places. 872 877 



b. Obtusatce. Veil obsolete. Pileus campanulato - convex, 



becoming flat ; smooth or atomate. Gills piano- or arcuato- 

 adfixed. 878 880 



c. Fibri Hoses. Pileus except 884 and 888 and stem at first 



fibrillose or floccose from the veil. Stem fistulose. 



881893 



