A frenulum (or frenum) is a small fold of tissue that prevents an organ in the body from moving too far.
Others, such as buckwheat, are very frost-tender. The cover crops listed here are widely adapted and can be grown in most areas of the United States, either as a summer or winter cover crop, depending on where you live. Rye This crop comes in two different types: annual rye and cereal rye. Both have their advantages.
Five general types of plants are commonly used as groundcovers in gardening: 1  Vines, which are woody plants with slender, spreading stems. 2  Herbaceous plants, or non-woody plants. 3  Shrubs of low-growing, spreading species. 4  Moss of larger, coarser species. 5  Ornamental grasses, especially low-growing varieties.