. Cyclopedia of farm crops. Farm produce; Agriculture. Fis. Hi. Timothy. Fig. 219. Oichard-grass. are faintly greenish yellow, becoming reddish brown in age. Red clover seed (Fig. 212) is distinguished by its lighter yellow or violet colors, its triangular form, broad scar notch and the absence of a pro- jection at the scar. Alfalfa seed (Fig. 215) is dis- tinguished by its more angular, oblong or kidney form, only the latter having a projection beside the nearly central scar. The contrast in form is even more pronounced in alsike and crimson clover seeds. (Figs. 213, 214.) Bur-CLOVER (MeJieag
. Cyclopedia of farm crops. Farm produce; Agriculture. Fis. Hi. Timothy. Fig. 219. Oichard-grass. are faintly greenish yellow, becoming reddish brown in age. Red clover seed (Fig. 212) is distinguished by its lighter yellow or violet colors, its triangular form, broad scar notch and the absence of a pro- jection at the scar. Alfalfa seed (Fig. 215) is dis- tinguished by its more angular, oblong or kidney form, only the latter having a projection beside the nearly central scar. The contrast in form is even more pronounced in alsike and crimson clover seeds. (Figs. 213, 214.) Bur-CLOVER (MeJieago Arabiea, aa ; Medicago denticalata, b). Fig. 217. These kinds are used as an adulterant of alfalfa seed. Medicago Arabiea seeds are mostly kidney-shaped, the scar being nearer one end than in alfalfa, a distinct projec- tion beside it. Fresh seeds are light yellow. The large seeds are larger than alfalfa seeds and are readily distinguished from them, the smaller being distinguished only with difficulty. Medicago dentie- ulaia seeds are mostly larger than alfalfa seeds, oblong-kidney-shaped, the scar notch prominent near tlie center and the projection slight or want- ing. Most of these seeds are distinguishable from the others. They are commonly darker than the seeds of Medicago Ai-ahiea. Timothy (Phleum pratense). Fig. 218. This seed has a characteristic appearance and is readily rec-. , 221. Red-top. ognized. It is not subject to adulteration, but is often an impurity of alsike seed, sometimes of red clover seed. The seed may either bear the hull (a a) or be free from it (b b). The presence of the hull gives fresh, well-cured seed a bright, silvery white appearance. The dull, oval seeds free from the hull are darker. -r- Orchard - grass (Dactylis glomerata). Fig. 219. This seed appears mostly in the hull. In this form it is straw-colored or darker. Individual seeds are triangular in section, being sharply angled along the back, tapering toward the ends, the apex awn- pointed
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