Moss in smoking malt in the production of Scotch whisky. "Sphagnum" moss, generally the species "S. cristatum" and "S. subnitens", is harvested while still growing and is dried out to be used in nurseries and horticulture as a plant growing medium. The practice of harvesting "peat moss" should not be confused with the harvesting of "moss peat". "Peat moss" can be harvested on a sustainable basis and managed so that regrowth is allowed, whereas the harvesting of "moss peat" is generally considered to cause significant environmental damage as the peat is stripped with little or no chance of recovery. Some "Sphagnum"
Moss in cities. Examples would be "Rhytidiadelphus squarrosus", a garden weed in Vancouver and Seattle areas; "Bryum argenteum", the cosmopolitan sidewalk moss, and "Ceratodon purpureus", red roof moss, another cosmopolitan species. A few species are wholly aquatic, such as "Fontinalis antipyretica", common water moss; and others such as "Sphagnum" inhabit bogs, marshes and very slow-moving waterways. Such aquatic or semi-aquatic mosses can greatly exceed the normal range of lengths seen in terrestrial mosses. Individual plants or more long are common in "Sphagnum" species for example. Wherever they occur, mosses require liquid water for at least part of the year to complete