AGARICACE^: 



Psathyra. 



XXXVIII. PSATHYRA Qudh 

 (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. 



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 89& 



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



tense and straight, fistulose. Gills usually adnexo- 

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

 places. 872877 



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



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

 adfixed. 878880 



c. Fibrilloscz. Pileus except 884 and 888 and stem at first 



fibrillose or floccose from the veil.. Stem fistulose. 



881 89a 



