Moss grows close to the ground because in order to stay in the damp conditions it needs to grow. If the moss was too high, the moving air will suck all the moisture away and dry out the plant. read more
The bundles are stiff, which also helps plants grow tall. The lack of bundles to transport water and nutrients limits the height of bryophytes, generally keeping the largest under 8 inches. Mosses also are restricted to living in damp locations. read more
Moss grows close to the ground because in order to stay in the damp conditions it needs to grow. If the moss was too high, the moving air will suck all the moisture away and dry out the plant. So, as shown in the picture, it exists within the boundary layer, with the sporophytes sticking up so the spores can be spread by the wind. read more