Seligeria cardotii is one of the two species in genus Seligeria, bryophytes of the Seligeriaceae family, in the Southern Hemisphere; an additional 19 species have been described in the Northern Hemisphere.

Its leaves are linear with a narrow midrib between 2–3 rows of translucent cells on either side.

[1] The leaves do not sheath at the stem and have an entire to slightly crenellate sobarnis margin.

The peristome contains 16 moderately short, reddish, lanceolate teeth approximately 40–μm.

[2] The type specimen of S. cardotii was described in the nineteenth century from a collection from New Zealand's South Island, where it is widespread on moist calcareous soils.