Sphagnum may have a number of different "Sphagnum" species. Individual peat moss plants consist of a main stem, with tightly arranged clusters of branch fascicles usually consisting of two or three spreading branches and two to four hanging branches. The top of the plant, or capitulum, has compact clusters of young branches. Along the stem are scattered leaves of various shapes, named stem leaves; the shape varies according to species. The leaves consist of two kinds of cells; small, green, living cells (chlorophyllose cells), and large, clear, structural, dead cells (hyaline cells). The latter have the large water-holding capacity. "Sphagnum", like
Moss Jernverk Schweigaard wrote in 1840, "The mining industry has been a school for mechanical and technical knowledge and insight." Not much is left from Moss Jernverk: most of the buildings were demolished. Among what is preserved are the administration building (the convention building) and the workers' buildings along the street north of the administration building. The mill by the waterfalls has also been preserved. Moss Jernverk Moss Jernverk (Moss Ironworks) was an ironwork in Moss, Norway. Established in 1704, it was for many years the largest workplace in the city, and melted ore, chiefly from Arendalsfeltet (a geologic province in Norway).