Edible.
Cap soft, fleshy, smooth, shell-shaped, white or cinereous, turning brownish or yellowish with age. Flesh white, somewhat fibrous. Gills white, broad and decurrent, anastamosing at the base. Stem usually not well defined, lateral, or absent. Spores elliptical, white. The caps are sometimes thickly clustered and closely overlapping, and sometimes wide apart. This mushroom has long been known as edible both raw and cooked. It has a pleasant but not decided flavor and must be cooked slowly and carefully to be tender and easily digestible. Old specimens are apt to be tough. It is found on decaying wood and often on fallen logs in moist places or upon decaying tree-trunks. It is frequently recurrent on the same tree. I have gathered great quantities of the Oyster mushroom during several seasons past from a fallen birch tree which spanned a small stream. The lower end of the tree rested on the moist ground at the edge of the stream. Specimens have been found on the willow, ash and poplar trees, and upon the apple and the laburnum.
Pleurotus sapidus Kalchb. Sapid Pleurotus. Edible.
This species closely resembles the Oyster mushroom in form and habit of growth, and is by some considered only a variety of P. ostreatus. It grows usually in tufts with the caps closely overlapping, varying in color white, ashy, grayish or brownish. Flesh white. The stems are white, smooth and short, mostly springing from a common base. The gills are white and very broad, and decurrent. The spores assume a very pale lilac tint on exposure to the atmosphere.
Pleurotus ulmarius Bull. "Elm Pleurotus." Edible.
The Elm Pleurotus is quite conspicuous by reason of its large size and light color. The cap is smooth and compact, usually whitish with a dull yellowish tinge in the center. Flesh white. The skin cracks very easily, giving it a scaly appearance. The gills are broad, and toothed or notched near their point of attachment to the stem as in the Tricholomas, white in color, turning yellowish with age. The stem is firm and smooth, solid and rather eccentric, thick and sometimes slightly downy near the base, from two to four inches in length. Although this mushroom seems to prefer the elm and is most frequently found on trees of that species, it is found also upon other trees, but principally the maple, the ash, the willow, and the poplar. It grows upon live trees, usually where the branches have been cut away, and upon stumps as well. Most authors recommend it as an esculent, although it has not the rich flavor of some other mushrooms. It dries well and can be kept thus for winter use. This species has a wide range and grows most abundantly in the autumn. Its resistance to cold has been frequently remarked.
AGARICINI.
Subgenus Amanita. The Amanitas are usually large and somewhat watery, the flesh brittle rather than tough. The very young plants are enveloped in a membranous wrapper, which breaks apart with the expansion of the plant, leaving a more or less persistent sheath at the base of the stem. The universal veil is distinct and free from the cuticle of the cap. The cap is convex at first, then expanded; in some species naked and smooth; in others, clothed with membranaceous patches of the volva. The stem is distinct from the fleshy substance of the cap, ringed and furnished with a volva or sheath. In some of the species this sheath is connate with the base of the stem, firm and persistent. In others, it is friable, at length nearly obsolete.
The ring is usually persistent, deflexed, more or less prominent, in rare cases pressed close against the stem, and sometimes scarcely distinguishable from it. The gills in most of the species are free from the stems, but there are exceptions to this rule. Spores white. As to geographical distribution, according to M. C. Cooke, seven-eighths of the species are distinctly located in the temperate zone, one-twentieth at a temperate elevation, and only one-twentieth presumably tropical. Out of the eighty species, about sixty are North American and European, and one species is found on the slopes of the Andes, in South America. As heretofore stated, this group among mushrooms is made responsible for most of the well authenticated cases of fatal poisoning by mushrooms. It would be judicious, therefore, for those who are not thoroughly familiar with the characteristics of the edible Amanitas to defer making experiments with them for table use until that familiarity is acquired.