Brachymitrion is a genus of
six species (Koponen 1977, 1983; Goffinet 1999) with a Neotropical-African
distribution. The genus is sometimes treated as a subgenus of Tayloria,
however, Koponen (1977) recognized it as a genus characterized by: 1. few
stomata in a short capsule neck, 2. hypophysis absent, 3. differentiated
opercula, 4. exothecial cell walls evenly thickened, 5. capsules unchanged when
dry, 6. peristome of 16 erect or slightly incurved, variously reticulate
exostome teeth that are laterally attached above in pairs. Other distinctive
features of the genus include the well-differentiated suboral region of the
capsules that consist of thick-walled, rectangular cells oriented at right
angles to those of the urn and relatively short setae that do not elongate
after spore maturation.
The Central American species of Brachymitrion
differ from other regional members of the Splachnaceae in having crenulate,
serrulate or spinose-toothed leaf margins. They occur either as epiphytes or on
soil. Goffinet (1999) provided a key to the six species of Brachymitrion.