PROENÇA, C.E.B., FARIAS-SINGER, R. and GOMES, B.M. (2007) “PLEONOTOMA ORIENTALIS (BIGNONIACEAE – BIGNONIEAE): EXPANDED DESCRIPTION, DISTRIBUTION AND A NEW VARIETY OF A POORLY KNOWN SPECIES”, Edinburgh Journal of Botany, 64(1), pp. 17–23. doi:10.1017/S0960428606000680.