Ecology. Open Yungas montane to humid puna; on soil. Elevation. 2600-4800 m. Distribution. Bolivia: Cochabamba, Santa Cruz. World range: Argentina and Bolivia.
Bartramia perpumila is distinguished by the the small plant stature to 1.5 cm, suberect and slightly flexouse leaves 2.5-4 mm, firm, thick-walled shoulder cells, thin- to thick-walled, linear leaf base cells, erect setae 2.5-4.5 mm, ovoid to globoe capsules to 2.2 mm, and absence of a peristome. The type collection was made by Lorentz from Navado de Castillo in the province of Salta, Argentina.
Specimens. Cochabamba: Herzog 4163 (JE; Fransén 1996: 177); Santa Cruz: Herzog 4293 (JE, L, S; Fransén 1996: 177).