180 CLAVIS AGARICINOUUM, 



phori, with decurveut gills, can be easily separated from Clitocyhe, 

 by their waxy nature ; and Lejnsta is known by the decurrent gills 

 separating from the hyraenophoruin. The species figured is Agaricus 

 (Clitocyhe) geotrupus, Bull. Spores "00028" X "0002", they sometimes 

 have a slight tendency to become echinate ; spines are greatly deve- 

 loped in the var. siibinvolutus, Batsch, a single spore of which is shown 

 at J. 



Subgenus 6. Pleurotus, Fr. Epicr. p. 129 (Plate C. fig. 6).— 

 Veil evanescent, or none ; pileus fleshy in the larger species, with a 

 smooth or ragged margin from the remains of the veil ; substance 

 either compact, spongy, slightly fleshy, or membranaceous ; stem mostly 

 lateral or wanting, when present, confluent and homogeneous with the 

 hymenophorum ; gills with a sinus or broadly decvuTcnt tooth. — Hab. 

 Most of the species grow on wood, a few only on the ground. 



Pleurotus corresponds with Claudopns, Plate CI. fig. 15, and Crepi- 

 dotus, Plate CII. fig. 22. The species are large, handsome, and 

 polymorphic, but some are small and rcsupinate ; they generally appear 

 late in the year, and return, year after year, to the same habitat more 

 frequently than terrestrial fungi : all are harmless and some edible. 

 All become putrid when old, and never coriaceous or woody; in 

 this they differ from Panus, Xerotus, Schizophyllum, and Lenzites. 

 The species figured is Agaricus (Pleurotus) spongiosus, Pr. Spores 

 •OOOi" X "OOOIS". The elongated shape is characteristic of many species 

 of this subgenus. 



Subgenus 7. Collybia, Pr. Epicr. p. 81 (Plate C. fig. 7). — 

 Pileus at first convex, with an involute margin ; stem with a carti- 

 laginous bark, of a different substance from the hymenophorum, but 

 confluent with it; gills adnate or slightly attached (not decurrent). — 

 Hab. Most of the species are epiphytal. Usually small and tough, 

 lasting far into the winter ; few only are known to be edible, as A. 

 fusipes, Bull, A. esculentus, Wulf., etc. Marasmius is closely allied to 

 Collybia. 



Collybia corresponds with Leptonia, Plate GI. fig. 16; Naucoria, 

 Plate CII. fig. 23 ; and Psilocybe, Plate CIII. fig. 30. The species 

 figured is A. (Collybia) fusipes, Bull. Spores -0002" x -00013" ; the 

 small section shows young plant of ^. (Collybia) viaculatus, A. and S., 

 to show involute margin of pileus. 



Subgenus 8. Mycena, Pr. Syst. Myc. vol. i. p. 140 (Plate C. fig. 8). 



