P.B.Phillipson (C.Presl) 1989 - Phillipson PB (1989) Taxonomy of Monopsis (Lobeliaceae): M. scabra and M. unidentata. Botanical Journal of the Linnean Society 99(3): 255-272. doi: 10.1111/j.1095-8339.1989.tb00403.x.
There is no corrections for Monopsis unidentata subsp. laevicaulis yet.