Sporangia and spores uniform. Ligules absent Lycopodiaceae
Stems with branches equal in length throughout. Roots in a basal tuft. Main stems not long and indeterminate. Sterile leaves similar to the slightly smaller sporophylls of the fertile zones in H. varia Huperzia
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