- PacNW Herbaria Records for Sphagnum squarrosum
- Search Arctos Database for Sphagnum squarrosum (Southeast only)
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- Encyclopedia of Life search for Sphagnum squarrosum
- iNaturalist Observations for Sphagnum squarrosum in Southeast Alaska
Southeastern Alaska Distribution: Common throughout.
Habitat: Common in wet, shaded sites, margins of peatlands, transitional forests, swampy areas, margins of ponds and pools, and on wet cliffs (especially at the crest). Occasionally mixed with other Sphagna, but frequently in pure colonies. From sea level to the subalpine and lower alpine.
Comments: Often with sporophytes.