Lycophytes

Subdivision Lycophytina

This is a clade that includes the clubmosses (lycopsida) and an extinct sister group, the zosterophylls. This group is united by features based on how the xylem matures in the stems, and how the sporangia are arranged on the stems.

Ecology & Form

Sporophyte (spore-bearing) phase

Stems

Leaves

Roots

Reproductive Structures

Classification

Embryophytes

Polysporangiophytes

  └Tracheophytes

    └Eutracheophyta

      └Lycophytes

Geologic Range

Diversity

Incertae sedis taxa

Halleophyton zhichangense

Above: Halleophyton zhichangense † (Figs 1-7 from Li & Edwards 1997)

Ornicephalum sichuanense

Above: Ornicephalum sichuanense (from Plate II of Edwards & Li 2018)

Yanmenia longa

Above: Yanmenia longa † (Fig 2, Edwards et al. 2016)

Additional Resources