Ecology: Dry inter-Andean valleys, open montane to puna, possibly páramo; on rocks and soil. Elevation: 1940-4100 m (Ecuador: 2155-3000, Peru: 2770-4100 m, Bolivia: 1940-3800 m). Distribution: Mexico, tropical Andes (Ecuador to northwest Argentina), Brazil.
Ecología: Bosques secos interandinos, montano abierto a puna, posiblemente en páramo; sobre rocas y suelo. Elevación: 1940-4100 m (Ecuador: 2155-3000, Perú: 2770-4100 m, Bolivia: 1940-3800 m). Distribución: México, Andes Tropicales (Desde Ecuador hasta el noroeste de Argentina), Brasil.
Brachymenium fabronioides is of similar stature and terrestrial preference as B. acuminatum and B. exile; see notes under B. acuminatum. The leaves of B. fabronioides are tightly imbricate, less than 1 mm, lanceolate to somewhat triangular with an acuminate apex, upper cells thin-walled and sublinear, and alar region distinct with quadrate to subquardate cells; innovation leaves smaller, ovate-acuminate, and costa excurrent. The type, Bryum fabronioides Müll. Hal., was collected in Juyuy, Argentina, by Lorentz in 1873. Synonyms include Bryum sericeum Mitt., B. sericeum var. denticulatum R. S. Williams, and B. subsericeum Broth.