352 FUNGUS-FLORA. 



** Gills free from the stem. 

 Pilosace. Volva and ring both absent. 



Agaricus. ( = Psalliola, Fr.) ring on stem present; volva 

 absent. 



Chitonia. Volva at base of stem present ; ring absent. 



PSATHYEA. Fries, (figs. 13 and 15, p. 351). 



Pileus submembranaceous, conical or campanulate, then 

 expanded, margin at first straight and pressed to the stem ; 

 stem central, polished, rather cartilaginous and fragile, hol- 

 low ; gills purplish or brownish, as are also the spores ; veil 

 absent or only universal and floccose or fibrillose. 



Agaricus, subgen. Psathyra, Fries, Epicr., p. 231 ; Cke., 

 Hdbk., p. 213; Fries, Hym. Eur., p. 304. 



Slender, fragile, hygrophanous. There are a few tough 

 species analogous to the tough species of Psilocybe. The 

 genera included in the Melanosporae are distinguished by 

 the gills being pale or grey at first, then black, and not 

 brown or purplish. 



Veil universal, fibrillose, or entirely absent. Pileus sub- 

 membranaceous, conical or campanulate, margin at first 

 straight and pressed to the stem. Corresponds to Mycena, 

 Nolanea, and Galera. Closely allied to PsatJiyrella, from 

 which the present is distinguished by the brown spores 

 (not black) and the brown or purplish gills. All the 

 species are terrestrial or grow on trunks, slender, hygro- 

 phanous. (Fries.) 



that of the pileus ; nat. size of a small specimen ; Fig. 7, spores of 

 same ; highly mag. ; Fig. 8, Stropharia melasperma, section showing the 

 adnate gills and ring on the stem ; nat. size ; Fig. 9, Hypholoma hypo- 

 xanthus; small specimen nat. size; Fig. 10, Hypholoma oedipus, entire 

 fungus ; nat. size; Fig. 11, Psilocybe itdus, entire specimen; nat. size ; 

 Fig. 12, section of same, showing adnate gills; nat. size; Fig. 13, 

 Psathyra gyroflexa, group of plants; nat. size; Fig. 14, Hypholoma 

 oedipus, section of pileus ; nat. size; Fig. 15, Psathyra urticaecola : nat. 

 gize; Fig. 16, Hypholoma sublateritius, basidium and spores; highly 

 mag. ; Fig. 17, Stropharia semiglolxita, section ; half nat. size. 



