sentences:  Rooted plants are little more advanced than their Silurian forebears, without a dedicated root system; however, the flat-lying axes can be clearly seen to have growths similar to the rhizoids of bryophytes today.By the Middle to Late Devonian, most groups of plants had independently developed a rooting system of some nature.As roots became larger, they could support larger trees, and the soil was weathered to a greater depth.