ground cover 也作 ground.cov.er
1. Small plants other than saplings, such as mosses, ferns, grasses, and undershrubs, growing on a forest floor; undergrowth.
2. A low-growing, dense growth of plants, such as a pachysandra or crown vetch, planted to prevent soil erosion in areas where turf is difficult or impossible to grow, as in deep shade or on a steep slope.
3. A plant used for such a growth.