Ecology. Puna; on sandstone rock. Elevation. 3930 m. Distribution. Bolivia: Cochabamba. World range: endemic to the tropical Andes (Peru, Bolivia).
Didymodon hegewaldiorum is characterized by the red to reddish-brown plants to 1.5 cm, presence of a stem hyalodermis and central strand, ovate to short ovate-lanceolate leaves to 1.4 mm (appressed to stem when dry), obtuse, often cucullate apices, partially to fully bistratose distally, subpercurrent costa, quadrate upper adaxial costal (epidermal) cells, 0-1 ventral stereid layer, 1 dorsal stereid layer, rounded to quadrate upper laminal cells with 1-2 low, simple to bifurcate papillae per cells, and smooth, thick-walled quadrate to rectangular basal cells.
Specimens. Oruro: Cano et al. 3399 (MUB).