Kaulfussia C.Presl Christensenia is a genus of ferns in the botanical family Marattiaceae.

The genus is confined to the Indo-Malayan region.

Christensenia is unique in the Marattiaceae, because of its reticulate venation, palmately arranged leaves and radial synangia.

The presence of a radial synangium is an archaic character, very similar to some of the fossil Asterothecaceae/Psaroniaceae, such as Scolecopteris.

After the 1993 revision by Rolleri, only two species and one variety are recognized: