Lyginopterids †

Tree "ferns" with seeds

Ecology & Form

Stems (Lyginopteris †)

Leaves

Reproduction

Classification

    └Embryophytes

      └Tracheophytes

        └Euphyllophytes

          └Lignophytes

            └Spermatophytes

              └Lyginopteridales

Above: Sphenopteris foliage

Diversity

Dictyastrum chesteriensis

Heterangium

Laceya hibernica

Occloa

Above: Occloa

Tetrastichia bupatides

Above: Cross-sections of Tetrastichia

Tristichia

T. ovensii

T. longii

T. tripos

Trivenia arkansana