Cryptomitrium is a genus of complex thalloid liverworts in the family Aytoniaceae. The genus name means “hidden turban” in reference to the inconspicuous sheath around the immature sporangium.^[1]

Sporophyte bearing receptacles are unlobed on  elongate, somewhat grooved stalks, which appear pale throughout or brownish purple near the base. The receptacle is a convex-expanded disc, thinning towards the margins.^[1]

Mature sporangia are brown, nearly spherical with very short seta, three to seven per receptacle, each opening by a lid-like operculum. The sporangia mature in early spring.^[1]

• Cryptomitrium himalayense Kashyap
• Cryptomitrium oreades Perold
• Cryptomitrium tenerum (Hook.) Austin ex Underw.