Schistidium confertum differs from other North American Schistidium Bruch & Schimp. species in having ovate upper leaves with long to short, broad, hyaline hair-points; cupulate capsules (length to width ratio 1:1); a well-developed peristome; and small spores (10–12 µm). The species is reported new to Maine where it was collected on rocks along and in the Allagash and St. John Rivers. A key to the 14 species of Schistidium in Maine is provided.