About

Sphagnum squarrosum, commonly known as the spiky bog-moss or spreading-leaved bog moss, is a peat moss species found in nutrient-rich, damp soils and wetlands across the Northern Hemisphere, with isolated populations in South America. Its spiky appearance, resulting from strongly spreading branch leaves, distinguishes it from other peat moss species. Playing an important role in wetland succession, the species is one of the first Sphagnum mosses to colonise developing wetlands. It shows considerable tolerance to mineral-rich conditions and actively modifies its habitat through cation exchange processes.

Unlike many other peat mosses that require highly acidic conditions, S. squarrosum thrives in areas with moderate calcium levels, particularly along stream banks, in fens, and in wet woodlands dominated by Salix (willows) and Betula (birches).

Where it grows

Sphagnum squarrosum has a broad geographical range spanning much of the Northern Hemisphere, occurring throughout North America and Eurasia. While it is widely distributed, the species shows particular concentration in northern regions of Europe. Its circumpolar range has been well-documented through specimens from Canada (including the Northwest Territories and Yukon), the United States (including Alaska), Greenland, multiple European countries, Japan, and various regions of Russia. The 2017 report of populations in southeastern Brazil has extended its known range into South America, representing its southernmost occurrence globally.

Other Sphagnum plants

Sphagnum · Sphagnum · Aongstroem's sphagnum · Austin's sphagnum · Plants · Sphagnum · Sphagnum · Low sphagnum · Contorted sphagnum · Toothed sphagnum · Sphagnum · Sphagnum falcatulum