. The cereals in America. STRUCTURE OF WHEAT 29 af that ar\' in promi- of the 54, Leaves. — There are four parts of the wheat le should be distinguished: (i) the blade, which may v length and widtn, in shape, in smoothness, and in the nence of its veins; (2) the sheath, which, as in all plants family, clasps the stem tightly and is split down the side ODposite the blade ; varies in growing plant from green to purple; (3) the ligule, a thin, transparent tissue borne at the juncture of the blade and sheath and clasping the culm, var}-- ing in length from .07 to .1 of an inch ( to mm.^); a
. The cereals in America. STRUCTURE OF WHEAT 29 af that ar\' in promi- of the 54, Leaves. — There are four parts of the wheat le should be distinguished: (i) the blade, which may v length and widtn, in shape, in smoothness, and in the nence of its veins; (2) the sheath, which, as in all plants family, clasps the stem tightly and is split down the side ODposite the blade ; varies in growing plant from green to purple; (3) the ligule, a thin, transparent tissue borne at the juncture of the blade and sheath and clasping the culm, var}-- ing in length from .07 to .1 of an inch ( to mm.^); and (4) the leaf auricle, thin projections of tissue, outgro^\ths from the base of the leaf blade var}-ing in color and hairiness. 55. Tillering.—Inasmuch as buds form in the axis of the leaves, by covering with earth, both roots and ciilms (branches) will form at any node upon the culm. Ordi- narily, however, branches form only at the lower nodes. The number of branches which can form from a single culm is necessarily lim- ited, but each branch may produce a limited number of branches and these branches in turn other branches, so that under favorable conditions several dozen culms and conse- quently spikes may be produced from a single seed This is kno'\^'n as tillering and is one of nature's methods of giving the plant power to adapt itself to its environment. Under ordinar}- field conditions only a comparatively few culms form, but 1 The Description of Wheat Varieties. By Carl S. ScofielA U. S. DepL of Agr., Bureau of Plant Ind. Bui. 47, p. A wheat leaf, showing I, blade, 2, sheath, 3, ligule, and 4, auricle. (About natural size.). 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 Hunt, Thomas Forsyth, 1862-1927. New York, O. Judd company;
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Keywords: ., bookauthorhuntthom, bookcentury1900, bookdecade1900, bookyear1904
