Torres-Leite, F., Bruniera, C.P., Zappi, D.C. & Carrijo, T.T. (2016)

True axillary inflorescences in Rudgea (Palicoureeae, Rubiaceae), a newly reported characteristic of two new Brazilian species, R. quisquiliae and R. axilliflora

. Phytotaxa 272 (3): 191–200. https://doi.org/10.11646/phytotaxa.272.3.3