  Yoshimi et al. [arXiv:1110.3573] have attempted to explain the
pressure(P)-dependent behavior of Fabre salts which exhibit charge order (CO),
antiferromagnetic (AFM), and spin-Peierls (SP) phases. Experiments find two AFM
phases, AFM1 at large P and AFM2 at small P. Yoshimi et al. suggest that there
also exist two distinct zero-temperature SP phases, SP1 and SP2. Here we point
out that the occurrence of two distinct SP phases contradicts experiments, and
is found because of unrealistic model parameters.
