218 CLAVIS AGAllICINOKUM. 



Subgenus 6. Hydrocybe, Fr. Epicr. p. 303. — Pileus generally thin, 

 glabrous, liygroplianous, but not viscid, cuticle rigid, not fibro-lace- 

 rate ; stem rigid, subcartilaginous without, never annulated or scaly. 



Genus V. Lepista, gen. nov. ; Lej)ista, Paxilll sect. Fr. Epicr. p. 

 315. — Spores (as well as the whole plant) dirty white; pileus fleshy, 

 with an involute margin gradually increasing indefinitely ; stem always 

 central, continuous with the horny hymenophorum ; gills fragile, per- 

 sistent, decurrent, membranaceous, entire, with a sharp edge, supported 

 by the horny hymenophorum. — Hab. All the species are terrestrial. 



I have followed Fries' later views in transferring some TricJiolomata 

 to this position, on account of the absence of a true trama, etc. ; as 

 Triclioloma is analogous to Entoloma, I have sought for the corre- 

 sponding absence of a trama in the latter subgenus, and from my own 

 notes I find it partially absent in Acjaricus (Entoloma) placenta, Batseh., 

 and A. (Entoloma) niclorosus, Fr. Certain species also occur in the 

 analogous subgenera Ilcheloma and Hypholoma with the trama partially 

 absent, as A. (Ilebeloma) latmginosus, Fr., and J. (Hypholoma) lacry- 

 mabundus, Fr. ; the character also pertains to some species of Coprinarii. 



The value of the trama as a character has not been properly studied, 

 and in future its presence or absence should be invariably given in all 

 descriptions of Agarics. Nylander and Hoffman affirm its presence in 

 Paxilliis involutiis, Fr. ; and there certainly appears to be a floccose 

 trama present in P. pannoides, Fr., a species which may be as readily 

 mistaken for a Cantharellus as P. porosus. Berk., for a Boletus. 



Genus VI. Paxillus, Fr. Gen. Hymen, p. 8, ex parte. — Spores (as 

 well as the whole plant) ferrugineous ; pileus fleshy, seldom entire, gene- 

 rally more or less dimidiate, entirely lateral or sessile, with an involute 

 maro'in, and gradually increasing indefiuitely; stem continuous with 

 the hymenophorum; gills tough, soft, persistent, decurrent, annsto- 

 mosino- behind, branching, or forming spurious pores as in Boletus, 

 witli a sharp edge, separating from the fleshy hymenophorum, owing 

 to the absence of a trama. — Hab. Generally on trunks of trees, saw- 

 dust, etc., but some are terrestrial. 



Genus VII. Hygrophoiius, Fr. Epicr. p. 330. — Spores white; veil, 

 when present, universal ; stem confluent with the hymenophorum ; gills 

 sharp-edged, trama similar in sul)stance to that of the pileus. — Hab. 

 On the ground, mostly late in the autumn, some in the summer. 



Most of the species arc handsome and easily recognized. From 



