. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 36 BULLETIN 1074, U. S. DEPARTMENT OF AGRICULTURE. WIDTH OF THE SHOCLDEB. The shoulder widths often differ from the glume widths. For this reason they are described separately, but on the same basis of meas- urement and by the use of the same terms, narrow, midwide, and wide (Fig. 5). SHAPE OF THE SHOULDER. Shoulder shapes are described in overlapping terms which allow for a considerable variation, which is nearly always present in the same spike. The terms used are want- ing, oblique, rounded, square, elevated, and ap
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 36 BULLETIN 1074, U. S. DEPARTMENT OF AGRICULTURE. WIDTH OF THE SHOCLDEB. The shoulder widths often differ from the glume widths. For this reason they are described separately, but on the same basis of meas- urement and by the use of the same terms, narrow, midwide, and wide (Fig. 5). SHAPE OF THE SHOULDER. Shoulder shapes are described in overlapping terms which allow for a considerable variation, which is nearly always present in the same spike. The terms used are want- ing, oblique, rounded, square, elevated, and apiculate. These shapes are shown in Figure 6. BEAK CHARACTERS. The word " beak" is used here for the short projection which terminates the keel of the glume. In some varie- ties it aproaches an awn in appearance. Scofield {173) first used the term beak, previous authors having referred to it as a tooth or point. The beaks vary in width, shape, and length. These char- acters are of considerable minor im- portance in identification and are used in the descriptions of the Fig. 5.—Shoulder widths: a, Nar- row ; b, midwide; c, wide. (Nat- ural size and enlarged 3 diame- ters.). 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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