By the Silurian, fossils of whole plants are preserved, including the lycophyte "Baragwanathia". From the Devonian, detailed fossils of rhyniophytes have been found. Early fossils of these ancient plants show the individual cells within the plant tissue. The Devonian period also saw the evolution of the first tree in the fossil record, "Wattezia". This fern-like tree had a trunk with fronds, and produced spores.