The fossil record provides little information about ancient mosses. Do you think nonvascular plants could have ever been as large as trees or shrubs? Provide evidence based on your knowledge of nonvascular plant anatomy. Solution 2). No, the nonvascular plants could have never been as large as trees or shrubs because they cannot provide the water and nutrients to the plant parts that are away from the source of water. The nonvascular plants cannot control their water supply internally, it is solely depends upon their external environment that provides water to the plant. So, they most likely grown over a lake or rocks to get the water and propagated vegetative (clonal moss)..