62 [Assembly 



places. It is more abundant in autumn, but occasionally appears as 

 early as June. It is no less valuable than the next species for its edible 

 qualities. A stew made of it is a very good substitute for an oyster stew. 



In Hungary, according to Dr. Kalchbrenner, it is not only eagerly 

 sought for food in the woods bntis also cultivated in gardens by fre- 

 quently moistening the elm trunks on which it grows. 



lu drying, the specimens roll up in an annoying manner, unless kept 

 under pressure. The dried specimens are very liable to the attacks 

 of insects. 



Pleurotus ostreatus, Fr. 



Oyster Agaric. Oyster Mushroom. 

 Agaricus ostreatus, Jacq. Agaricus dimidiatus, Bull. 



Pileus fleshy, two to four inches broad, soft, convex or slightly 

 depressed behind, subdimidiate, often cfespitosely imbricated, moist, 

 glabrous, whitish cinereous or brownish, flesh white ; lamellas broad, 

 decurrent, subdistant, anastomosing at the base, white or whitish ; 

 stem, when present, very short, firm, lateral, sometimes strigose-hairy 

 at the base ; spores oblong, white, .0003 to .OOO-i in. long, .00016 

 broad. 



Decaying wood and trunks of trees. June to November. Edible. 



With us this species is much less frequent than the preceding one. 

 Specimens, nearly white when fresh, but yellowish when dried, were 

 collected on oak trunks in Orange county. The spores were clearly 

 white on white paper, but in other respects the plants miglit readily 

 be taken for a whitish subsessile form of the preceding species. 



Pleurotus salignus, Fr. 



Willow Agaric. 



Agaricus salignns, Abb. d. Schw. Agaricus brumalis, Scop. 



Pileus fleshy, two to six inches broad, firm, spongy, convex or nearly 



plane, sometimes depressed and slightly hairy toward the base, nearly 



dimidiate, horizontal, whitish, dark-cinereous or ochraceous ; lamellaa 



decurrent, some of them branched, eroded on che edge, distinct at the 



base, whitish ; stem, when present, very short, lateral, tomentose ; 



spores oblong, .00086 in. long, .00015 broad. 



Decaying wood, especially of willows. Sandlake. 

 I have admitted this species with some hesitation, for our specimens, 

 though apparently belonging to it, are not in good condition and 

 hence doubtful. Fries says it is distinguished from Panus conchatus 

 by its soft, not coriaceous, substance, but Grillet characterizes its sub- 

 stance as coriaceous when old. 



Pileus definitely lateral, neither margined behind nor at first resupi- 

 ■ nate, sessile or attached to a very short lateral stem or stem-like base. 



Pleurotus serotinus, Fr. 



Late Agaric. 



Agaricus serotinus Schrad. Agaricus serotinoides, Pk. 



Pileus fleshy, one to three inches broad, compact, convex or nearly 



plane, viscid when young and moist, dimidiate reniform or suborbic- 



