. Introduction to botany. Botany. rUNGI AND FUNGOUS DISEASES OE PLANTS 235 undergrowth one may find large numbers of these saprophytic plants growing upon decaying organic matter. By breaking open an old log or branch of wood (fig. 183) upon which fungi are growmg, or by upturning rich soil, one often finds the extensively interwoven, mold-like saprophytic growth. This mternal growth gathers nourish- ing material for the whole depend- ent plant, and at the same time helps to bring about the decay of the material upon which it lives. 221. The algae-fungi. There are many different groups of fung
. Introduction to botany. Botany. rUNGI AND FUNGOUS DISEASES OE PLANTS 235 undergrowth one may find large numbers of these saprophytic plants growing upon decaying organic matter. By breaking open an old log or branch of wood (fig. 183) upon which fungi are growmg, or by upturning rich soil, one often finds the extensively interwoven, mold-like saprophytic growth. This mternal growth gathers nourish- ing material for the whole depend- ent plant, and at the same time helps to bring about the decay of the material upon which it lives. 221. The algae-fungi. There are many different groups of fungi, and they are often so unlike that it is at first hard for the student to regard them as belonging to the same larger group, the fungi. In the case of some of the molds, if the tlu:ead-like fibers of which they are composed were to pos- sess chlorophyll, they would ap- pear quite similar to some of the algae. Because of this structural resemblance one group of fungi is called the algae-fungi {Pliycomy- cetes, meaning " algse-fungi"), that is, fungi that are more like algse than are other fungi. Most of the saprophytic molds and a good many destructive parasites belong to the algae-fungi. A few types will show their nature, how they live, and how they affect the things upon which they live. 222. Bread mold. If a piece of slightly moistened bread is placed in a glass jar or in a covered dish for a few days, an abun- dant supply of mold soon appears upon it. Several kinds of molds may develop at the same time under such conditions, but the common bread mold, or black mold, is the one which. riG. 183. A section through a dead branch of a Cottonwood tree Note the white patches oi internal mycelium and the external spore- producing bodies of the fungus, a Polyporus. 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 orig
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