Sporangia and spores uniform. Ligules absent Lycopodiaceae
Stems with unequal branches almost throughout. Roots at intervals on the lower surface of the main stems. Main stems indeterminate but the branchlet system determinate. Leaves dimorphic with the sporophylls modified into distinct strobili
Strobili either pendent and terminal on the branches of the much-branched upper portion of the aerial stems or the strobili erect and lateral (or sometimes also a terminal one) on simple or several times forked aerial stems Lycopodiella
Strobili ± erect and borne at the tips of laterally arising branches from the aerial stems Lycopodium