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Time Period: Late Devonian; Characteristics: Combination of tree fern and modern tree, large fronds, early form of wood.

Time Period: Carboniferous; Characteristics: Resembled giant horsetails, jointed stems, grew in vast 'coal forests'.

Time Period: Early Devonian; Characteristics: Small, leafless with dichotomous branching, one of the earliest known vascular plants.

Time Period: Carboniferous; Characteristics: Seed fern, large leaves with a net-veined structure, important component of Carboniferous forests.

Time Period: Ediacaran; Characteristics: Early multicellular organism, potentially a sea pen-like animal or an early plant.

Time Period: Devonian to Present; Characteristics: Resembles early vascular plants, lack of roots and leaves, dichotomous branching.

Time Period: Triassic to Cretaceous; Characteristics: Gymnosperm order, flower-like reproductive structures, similar to cycads.

Time Period: Jurassic; Characteristics: Belonged to the cycadophytes, leaflets arranged in a feather-like pattern, commonly found in Jurassic deposits.

Time Period: Carboniferous to Permian; Characteristics: Tall, tree-like plant with a fluted trunk and vertical rows of leaves, coal-forming swamps.

Time Period: Permian; Characteristics: Large leaves, evidence for the theory of continental drift, seed fern.

Time Period: Early Cretaceous to Present; Characteristics: Southern beeches, deciduous or evergreen, present in Southern Hemisphere.

Time Period: Carboniferous; Characteristics: Tree-like plant, diamond-shaped leaf scars, grew in swampy forests.

Time Period: Silurian to Devonian; Characteristics: Earliest known vascular plant, lacked true leaves and roots.

Time Period: Jurassic to Cretaceous; Characteristics: Resembles modern cycads, stout trunks and crown of large, hard leaves.