"It is, in fact, for the production of this powdery mass that the mushroom, as we know it, is formed. The brown powder consists of innumerable minute simple cells in the form of ovate bodies, termed "spores." These serve for the reproduction of the mushroom. They are equivalent to the green powder mass produced by molds which grow upon cheese, bread, and the like. Their function is that of reproducing the mushroom, but they should not be termed seeds."