White-spored Series 
centric, straight, or curved; firm, solid, equal, or tapering at 
the base. 2-4 inches long. 
Ring or Annulus—None. 
Spores—W hite. 
Filesh—W hite. 
Time—June to August. 
Habitat—On wood; common on railroad ties. 
GENUS PLEUROTUS 
In the genus Pleurotus the stem is attached to the cap at 
some point to one side of the centre. The stem may be on the 
very margin of the cap, or may be wanting altogether. The 
three species to be mentioned all grow on dead wood—either on 
dead trees or on dead branches of living trees. 
The name Pleurotus comes from a Greek word meaning 
side, and has reference to the position of the stem. 
Oyster Mushroom (Edible) 
Pleurotus ostreatus 
Cap or Pileus—Fleshy, convex, smooth, and moist. White, 
or tinted with ash colour or brown. 
Gills or Lamelle—W hite, or tinted with ash; broad; growing down 
the stem, and 
branching again 
and again at the 
base. 
Stem or Stife—Short 
or wanting. 
Spores— White, ob- 
long. 
Flesh—W hite, tough. Section of P, ostreatus 
Time—September. 
Habitat—On dead wood. The specimens pictured were found 
growing on a dead forest tree at Lake Placid. The largest 
shells measured four inches across. 
Pli-rd'-tiis Os-tré-a’-ttis 
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