(smjjames)
Also, that star is missing it's white dwarf companion.
Many catalog stars in SE are missing companions. Anyone who feels like contributing to a complete catalog of binaries in SE is welcome to do so (I will open a thread on this shortly, which I really should have done long ago).
As far as barium stars go, it appears that they are not generally given their own spectral class separate from the traditional Morgan-Keenan system, which would explain why SE has none.