Platyhypnum is a genus of mosses in the family Amblystegiaceae.
Previously accepted as Ochyraea, that genus was named in honour of Ryszard Ochyra (born 1949), a Polish bryologist and was circumscribed by Jiří Váňa in J. Bryol. vol.14 on page 261 in 1986. They have been found in Europe and across Russia.