104 Pleurotus. 



* * Pileus fleshy, striate, upper surface gelatinous, or 

 with a viscid pellicle. 



mastrucatus, Fr. P. 4 5 cm. resup. then exp. and horizontal, 

 often lobed, brown, with erect bristly squamules ; g. broad, greyish 

 white ; sp. - - . 



[rivulorum, Pat. and Doas. P. subgelatinous, pellucid, rusty 

 brown and covered with white down, horizontal or ascending ; g. grey 

 then vinous ; s. lateral, tubercular, downy, white, rosy when touched ; 

 sp. 46. 



[tremens, Q. P. reniform or flabellate, diaphanous, rosy-violet, 

 tremelloid ; g. sinuate, pinkish ; s. lateral, colour of p. ; sp. rough, 

 67. 



atrocoeruleus, Fr. P. 25 cm. fleshy, downy, dusky blue; 

 g. broad, whitish ; sp. glob. 2 3. 



P. sometimes brownish, and g. sometimes yellowish. 



[myxotrich.us. Lev. P. reniform, at first viscid, becoming spongy, 

 covered with white down, sessile or with a short stem ; g. rather 

 broad, crowded ; sp. 10 12 long. 



[furvellus, Karst. P. dusky or bluish rosy, yellowish-white then 

 brownish when old ; sp. 69 x 4 5. 



Allied to P. unguicularis but larger and becoming pale. 



Leightoni, B. P. 1 1-5 cm. at first obliquely conical then shell- 

 shaped, umber or lead-colour, scurfy and with short black bristles ; g. 

 distant, tan, forked at base ; sp. . 



algidus, Fr. P. 2 3 cm. horizontal, reniform, pellicle thin, 

 viscid, reddish-brown or grey ; g. crowded, yellowish. 



fluxilis, Fr. P. reniform, gelatinoso- viscid above, umber; g. 

 radiating from a lateral point, distant, whitish ; sp. 10 long. 



[unguicularis, Fr. P. resup. covered with a viscid pellicle, grey 

 or blackish ; s. incurved then ascending, very short, white ; g. distant, 

 white; sp. 4 6 x 1'5. 



[Silvanus, Sacc. P. thin, sessile, cupulate or dimidiate, resupi- 

 nate then reflexed, very even, glabrous, greyish black, very minutely 

 whi te- scurfy ; g. broad, dingy white; sp. strongly curved, 89 

 x 3-54. 



cyphellaeformis, B. P. 58 mm. pendulous, cup-shaped, downy 

 or mealy, upper layer gelatinous, grey; g. narrow, distant, pure 

 white; sp. . 



Resembling a Cyphella in habit. 



[nivosus, Q. P. thin, campan. sessile, gelatinous, white and like 

 parchment when dry, granularly rugose, striate, subpellucid, smoky 

 grey, when moist with hyaline warts ; g. narrow, white ; sp. reniform, 

 12x2. 



applicatus, Batsch. P. 48 mm. dusky grey, sessile, thin, rather 



