In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the subfamily Lycopodioideae.

[1] Some sources do not recognize the genus, sinking it into Lycopodium.

[2] It is treated as section Obscura when retained within Lycopodium.

The genus includes a discrete group of plants with similar morphologies.

As of June 2024[update], the Checklist of Ferns and Lycophytes of the World recognized the following species:[3]