. Botany of the southern states. In two parts. Botany. and stem should be founded, is contained in the first part of our definition, that the root is the descending part of the axis of a plant. If it descends it is a root, and if it ascends it is a stem ; we mean, of course, when they meet with no physical impedi- ment. 67. The forms of roots are various, and receive different names in the de- scriptions of plants. Although various divisions have been made by different Botanists, yet great discrepancies exist, among them. We shall describe only the most common forms. (1.) Branching Root, or Ra
. Botany of the southern states. In two parts. Botany. and stem should be founded, is contained in the first part of our definition, that the root is the descending part of the axis of a plant. If it descends it is a root, and if it ascends it is a stem ; we mean, of course, when they meet with no physical impedi- ment. 67. The forms of roots are various, and receive different names in the de- scriptions of plants. Although various divisions have been made by different Botanists, yet great discrepancies exist, among them. We shall describe only the most common forms. (1.) Branching Root, or Radix ra- mosa, Fig. 28. These roots are such as subdivide in the earth in a man- ner similar to the divisions of the stem, and are found exhibited in the forest trees and shrubs. This variety forms the true type of roots ; and is the one from which our ideas of this organ are formed, as distinguishing it from the other organs of the plant. (2.) The Fibrous Root, or Radix fibrosa. This variety consists of numerous fibers pro- ceeding from the neck of the plant, and may be seen in most grasses and grains. Fig. 29. (3.) Fasciculated roots. When the fibers of roots be- come enlarged by the deposition of starch, they form this variety of root, as exhibited by the Dahlia, Peony, &c, Fig. 30. (4.) The Tap root, or conical root, when the root sinks perpendicularly into the earth, and tapers regularly from the base to the apex with very few fibrous radicles, as in the Beet, Parsnip, &c, Fig. 31. This variety contains some of the most important garden vegetables, and it is seldom found Branching Fig. 30. Fibrous 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 Darby, John, 1804-1877. [from old catalog]. New York, A. S. Barnes & co. , [etc. ,etc. ]
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1885
