Key to the genera
| 1a. Horizontal stems present, sporophylls different from vegetative trophophylls, solitary or aggregated into erect or pendulous strobili | |
| 2a. Strobili solitary or aggregated, stipitate | Lycopodium |
| 2b. Strobili solitary, sessile | Lycopodiella |
| 1b. Horizontal stems absent, sporophylls similar to vegetative trophophylls | Huperzia |