. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. 394 THE NON-VASCULAR PLANTS. Fig. igi. — A lichen growing upon the bark of a tree. of plants besides bacteria which are included under fungi but which are very different from ordinary fungi. They are different in that they completely envelop the host from which they draw nourish- ment. They are com- posed of fungi and algae which grow together. The principal part of the structure is formed by the hyphse of the fungi, and enmeshed among them are found the c
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. 394 THE NON-VASCULAR PLANTS. Fig. igi. — A lichen growing upon the bark of a tree. of plants besides bacteria which are included under fungi but which are very different from ordinary fungi. They are different in that they completely envelop the host from which they draw nourish- ment. They are com- posed of fungi and algae which grow together. The principal part of the structure is formed by the hyphse of the fungi, and enmeshed among them are found the cells of the alga. (See Figure IQ2.) The fungus of the lichen derives its nourishment from the cells of the alga, while the alga derives its moisture and solutes from the hyphas of the This arrangement makes it possible for lichens to live where either algae or fungi alone could not live. We find lichens on bare rocks. They are the first plants to appear in such places. By their growth and decay they gradually pro- duce a little soil. Then other plants come in and crowd the lichens out. Thus the lichens are the first on rocks of what are called pioneer plants. Some- times you may find upon lichens little saucer-shaped out- growths in which spores are produced,. 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 Coulter, John G. (John Gaylord), b. 1876. New York, American Book Co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
