Brooker, M.I.H. & Hopper, S.D. (20 December 1991), A taxonomic revision of Eucalyptus wandoo, E. redunca and allied species (Eucalyptus series Levispermae Maiden - Myrtaceae) in Western Australia. Nuytsia 8(1): 129-131, Figs 68 (map), 70 [tax. nov.]

• Type: Madyerip track, 0.6km E of Donnelly Track, Stirling Range National Park, Western Australia, 22 March 1983, M.I.H. Brooker 8040 (holo: PERTH; iso: CANB, MEL, NSW).

• APC Dist.: WA

• Etymology: "From the Latin, oppositus., placed against, side by side, alluding to its affinity with and geographical position compared to the nominate subspecies."

Brooker, M.I.H. & Kleinig, D.A. (2001), Field Guide to Eucalypts Edn. 2, 2 (South-western and southern Australia): 418 [secondary reference]

Centre for Plant Biodiversity Research (2006), EUCLID Edn. 3: - [secondary reference]

Council of Heads of Australasian Herbaria (31 July 2018), Australian Plant Census: - APC [secondary reference]

taxonomic synonym: Eucalyptus xanthonema subsp. apposita Brooker & Kleinig nom. inval.

• APC Dist.: WA

French, M. & Nicolle, D. (2019), Eucalypts of Western Australia: The south-west coast and ranges: 126 [taxonomic synonym]

taxonomic synonym of: Eucalyptus xanthonema Turcz. legitimate

Percy-Bower, J.M. & Parker, C.M. (24 June 2021), Updates to Western Australia’s vascular plant census for 2020. Nuytsia 32: 11 [taxonomic synonym]

taxonomic synonym of: Eucalyptus xanthonema Turcz. legitimate

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