. Cyclopedia of farm crops. Farm produce; Agriculture. Fig. 339. Trifolium agrarium. Fig. 338. Crimson clover. Group II. Less important or weed clovers. The small, introduced clovers of this group, occurring about culti- vated lands or along roadsides, are of two kinds,— the yellow-flowered and the silky-headed. They are all low, more or less trailing or weak-spreading annual plants, producing little herbage and of small value where other clovers will succeed. One of the black medics (Medicago lupulina, the bur or hop clover) is often confused with the true clovers. The commonest yellow-headed
. Cyclopedia of farm crops. Farm produce; Agriculture. Fig. 339. Trifolium agrarium. Fig. 338. Crimson clover. Group II. Less important or weed clovers. The small, introduced clovers of this group, occurring about culti- vated lands or along roadsides, are of two kinds,— the yellow-flowered and the silky-headed. They are all low, more or less trailing or weak-spreading annual plants, producing little herbage and of small value where other clovers will succeed. One of the black medics (Medicago lupulina, the bur or hop clover) is often confused with the true clovers. The commonest yellow-headed clovers are Tri- folium affrarium, Linn., sometimes called yellow or hop clover (Fig. .339), with ovate-oblong leaflets that are all sessile and narrow stipules attached prominently to the petiole, the plant about a foot high; T. procumbcns, Linn., the low or creep- ing hop clover (Fig. .340), with wedge-shaped leaf- flets, the terminal one of which is short-stalked, and short stipules, the heads smaller (one-half inch, or less, long), and the plant more spreading and about six inches tall. T. agrarhun (sometimes called T. aureum) is very abundant on sandy lands in some parts of the country, and is considered to be of some value as pasture. The other group comprises only one common species, the rabbit-foot or stone clover {T. arirnse, Linn.) (Fig. 341). The plant grows a foot high, silky-gray all over, the leaflets linear or oblanceo- late, the whitish-flowered heads becoming silky and soft. This clover is often so abundant on light lands as to form the principal growth after harvest. It might be utilized in some places as an early mulch or a catch-crop. Group III. Wild or little-known clovers. There are a good number of native clovers, but they have not come into prominence agriculturally and" they need not be discussed here. Descriptions of them may be found in the standard floras. Some of these clovers have been cultivated to a limited extent, or in an experimental w
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