. Botany for agricultural students . Botany. 140 ROOTS. Fig. 125. — Sugar Beet, a plant with a fleshy tap-root. and the Dandelion, where the shoots die down in the fall to be followed by new ones in the spring. Thus the tap-root system is well adapted to the perennial habit. In some plants, as Radishes, Beets, Carrots, Turnips, etc., where the storage function is quite prominent, the tap-root is tender and of much importance as a vegetable. (Fig. 125.) From some fleshy roots valuable products are extracted, notably the Sugar Beet from which most of our sugar is ob- tained. Plants having promin
. Botany for agricultural students . Botany. 140 ROOTS. Fig. 125. — Sugar Beet, a plant with a fleshy tap-root. and the Dandelion, where the shoots die down in the fall to be followed by new ones in the spring. Thus the tap-root system is well adapted to the perennial habit. In some plants, as Radishes, Beets, Carrots, Turnips, etc., where the storage function is quite prominent, the tap-root is tender and of much importance as a vegetable. (Fig. 125.) From some fleshy roots valuable products are extracted, notably the Sugar Beet from which most of our sugar is ob- tained. Plants having prominent tap-roots with short lateral roots can be grown close together without injury. Due to this fact and to the size of the shoot, such plants as Clover, Alfalfa, Beets, and others with the tap-root system grow well when crowded. The fascicled root-system, consisting of a cluster of roots all of which are much enlarged in connection with the storage of food, is characteristic of a few plants of which the Sweet Potato and Dahlia are two that are well known. (Fig. 126.) Adventitious roots, so named because of their occurrence in un- accustomed places, may be mentioned here, although the classification pertains to the place of occurrence and not to any peculiar fea- ture of the root itself; for any root, whether fleshy or fibrous, developing from leaves or from stem regions where roots are not nor- mally present is called ad- ventitious. All roots may be regarded as adventitious except those, known as the primary ones, which develop directly from the radicle of the embryo. The ability of many shoots to develop roots from various re-. 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 Martin, John N. (John Nathan), b. 1875. New York : John Wiley & Sons, Inc.
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