sentences:  By contrast, with the exception of "Psilotum" modern vascular plants have heteromorphic sporophytes and gametophytes in which the gametophytes rarely have any vascular tissue.There is no evidence that early land plants of the Silurian and early Devonian had roots, although fossil evidence of rhizoids occurs for several species, such as "Horneophyton".The earliest land plants did not have vascular systems for transport of water and nutrients either.