. Practical botany. Botany. THE BASIDIUM FUNGI (BASIDIOMYCPJTES) 251 to the fact that the underground mycelium either exhausts all available food, or deposits within the circle secretions which for a few years prevent further growth of this fungus. Upon logs, trees, and stumps many kinds of toadstools are found, as those shown in Figs. 207 and 208. But most abundant are the various species of Polyporus (meaning many pores) and other genera (Fig. 209). These often are hard. Fig. 207. A group of small toad- stools (Marasmius) growing from decaying wood Natural size Fig. 208. The oyster toadstool
. Practical botany. Botany. THE BASIDIUM FUNGI (BASIDIOMYCPJTES) 251 to the fact that the underground mycelium either exhausts all available food, or deposits within the circle secretions which for a few years prevent further growth of this fungus. Upon logs, trees, and stumps many kinds of toadstools are found, as those shown in Figs. 207 and 208. But most abundant are the various species of Polyporus (meaning many pores) and other genera (Fig. 209). These often are hard. Fig. 207. A group of small toad- stools (Marasmius) growing from decaying wood Natural size Fig. 208. The oyster toadstool growing upon the dead and de- caying branch of a tree Three eighths natural size and woody, and instead of gills they have many small pores upon the under surface, within which the basidia bear the spores. In some species of Polyporus the reproductive body may continue its growth annually for many years. Meantime its mycelium, which feeds it, has been growing within the tissues of the host and gradually bringing about its decay. Another toadstool (^Hydnum septentrionale), the mycelium of which produces the heart rot of the sugar maple, forms a reproductive body which, though its general form is like the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917; Caldwell, Otis William, 1869- joint author. Boston, New York [etc. ] Ginn and company
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