Cyclostigma is a genus of extinct plants belonging to the Lycopodiopsida (lycopsids).

was first used by Samuel Haughton in 1859 for the type species C. kiltorkense.

[1] The name Cyclostigma has been used for a genus no fewer than four times.

Three are synonyms: Hao and Xue in 2013 listed Cyclostigma as a lycopsid.

This article about a prehistoric lycophyte is a stub.