Ecology: Open montane; on soil. Elevation: 2770 m (Ecuador:2770 m, Peru: ? m). Distribution: Widespread in the Northern Hemisphere, South America and Africa.
Ecología: Regiones montanas, sobre suelo. Elevación: 2770 m (Ecuador: 2770 m, Perú ? m). Distribución: Ampliamente distribuida en el Hemisferio Norte, Sudamérica y Africa. La colección (Rose 19529, NY) de Perú, Arequipa, fue nombrada originalmente B. concavum.
Bryum pallens is characterized by the oblong-lanceolate leaves (ca. 2-2.5 mm long), acuminate apex, distinctly decurrent leaf base, entire and recurved margins, distinct border, percurrent to short excurrent costa, laminal cells thin-walled, lax upper cells, long rectangular basal cells, dioicous sexual condition, pyriforme capsules with a distinct elongate neck. The collection (Rose 19529, NY) from Peru, Arequipa, was originally named B. concavum.