Sphagnum contortum is a species of moss[1] reported in North America and Europe.

[3][4]: 84 It occurs in minerotrophic habitats, riparian areas,[6]: 125  peatlands,[5] and rarely in open wet woodlands.

[7] NatureServe lists it as critically imperiled in States like Washington, New Jersey, Pennsylvania, Virginia, North Carolina, and Montana[2] (it only occurs in Flathead County).

[8] In Canada, S. contortum is widely spread out through the province of Quebec[6]: 125  where it is listed as apparently secure by NatureServe.

But it is listed as vulnerable in other provinces like Alberta, British Columbia, and Ontario.