A provisional checklist of neotropical Rubiaceae - Robbrecht, Elmar (1992)

An enumeration of the plants collected in Bolivia by Miguel Bang : with descriptions of new genera and species - Rusby, Henry Hurd, 1855 -1940 ([Torrey Botanical Club], 1893)

Index Kewensis plantarum phanerogamarum. nomina et synonyma omnium generum et specierum ab initio anni MDCCCCXXXI usque ad finem anni MDCCCCXXXV complectens Supplementum nonum - Royal Botanic Gardens, Kew. (e prelo Clarendoniano)

Publication. Field Museum of Natural History Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1931)