"Mushrooms are not, however, everywhere equally abundant, owing as well to climate as to the more general cultivation of the soil: the character of many of the sorts is, therefore, not perfectly known, and most of them are passed over as deleterious. Indeed, the greatest caution is requisite in selecting any species of this tribe for food; and we can advise none but an experienced botanist to search after any but the common and familiar sort (Agaricus campestris) for food."—Loud.
COMMON MUSHROOM. M'Int. Rog.
Champignon. Agaricus campestris.
This Mushroom, when it first appears, is of a rounded or button-like form, of a white color, and apparently rests on the surface of the ground. When fully developed, "the stem is solid, two or three inches high, and about half an inch in diameter; its cap measures from an inch to three and sometimes even upwards of four inches in diameter, is of a white color, changing to brown when old, and becoming scurfy, fleshy, and regularly convex, but, with age, flat, and liquefying in decay; the gills are loose, of a pinkish-red, changing to liver-color, in contact with but not united to the stem, very thick-set, some forked next the stem, some next the edge of the cap, some at both ends, and generally, in that case, excluding the intermediate smaller gills."
Common Mushroom.
Loudon says that it is most readily distinguished, when of middle size, by its fine pink or flesh-colored gills and pleasant smell. In a more advanced stage, the gills become of a chocolate color; and it is then more liable to be confounded with other kinds of dubious quality: but the species which most nearly resembles it is slimy to the touch, and destitute of the fine odor, having rather a disagreeable smell. Further, the noxious kind grows in woods, or on the margin of woods; while the true Mushroom springs up chiefly in open pastures, and should be gathered only in such places.
Cultivation.—"This is the only species that has as yet been subjected to successful cultivation; though there can be little doubt that all or most of the terrestrial-growing sorts would submit to the same process, if their natural habitats were sufficiently studied, and their spawn collected and propagated. In this way, the Common Mushroom was first brought under the control of man.
"The seeds of the Common Mushroom, in falling from the gills when ripe, are no doubt wafted by the wind, and become attached to the stems and leaves of grasses and other herbage; and notwithstanding they are eaten by such animals as the horse, deer, and sheep, pass through their intestines without undergoing any material change in their vegetative existence: and hence, in the dung of these animals, when placed together, and kept moderately dry, and brought to a slight state of fermentation, we discover the first stage of the existence of the future brood of mushrooms. This is practically called 'spawn,' and consists of a white, fibrous substance, running like broken threads through the mass of dung, which appears to be its only and proper nidus."—M'Int. It is prepared for use as follows:—