Familia: Rhamnaceae
Subfamilia: Ziziphoideae
Tribus: Unplaced Ziziphoids
Genera: Alphitonia – Ceanothus – Colubrina – Emmenosperma – Granitites – Jaffrea – Lasiodiscus – Schistocarpaea

Name

Unplaced Ziziohoiods
Note: This is not a taxonomic unit, but a group of possibly related genera that cannot be placed in any of the recognized tribes, but do not form a distinct enough group that could be elevated to tribal rank.

References

• Hauenschild, F., Favre, A., Schulz, M. & Muellner-Riehl, A.N. 2018. Biogeographic analyses support an Australian origin for the Indomalesian-Australasian wet forest-adapted tropical tree and shrub genus Alphitonia and its close allies (Rhamnaceae). Botanical Journal of the Linnean Society 188(1): 1-20. DOI: 10.1093/botlinnean/boy048 Reference page. 
• Hopkins, H.C.F., Pillon, Y., Stacy, E.A. & Kellermann, J. 2015. Jaffrea, a new genus of Rhamnaceae endemic to New Caledonia, with notes on Alphitonia and Emmenosperma. Kew Bulletin 70(4): 1-19. DOI: 10.1007/s12225-015-9593-6 ResearchGate Reference page. 
• Reveal, J.L. 2012. An outline of a classification scheme for extant flowering plants. Phytoneuron 2012-37: 1–221. PDF Reference page. 
• Richardson, J.E., Fay, M.F., Cronk, Q.C.B. & Chase, M.W. 2000. A revision of the tribal classification of Rhamnaceae. Kew Bulletin 55{2}: 311-340. DOI: 10.2307/4115645 JSTOR Reference page. 
• Stevens, P.F. 2001 onwards. Angiosperm Phylogeny Website. Version 14, July 2017 [and more or less continuously updated since]. Online. Reference page.