Nicolle, D. (1 August 2000), Three new taxa of Eucalyptus subgenus Eudesmia (Myrtaceae) from Queensland and Western Australia. Nuytsia 13(2): 322-324, fig. 3 (map) [tax. nov.]

• Type: "c. 3 km north-east of Horwick Hill, in location 251, western Australia, 21 September 1968, A.E.Orchard 1121 (holo: PERTH 1441779; iso: AD, CANB, L)."

taxonomic synonym: Eucalyptus sp. B [n/a]

• Etymology: "From the Latin extrico – disentangled, free, referring to the identity of this species being previously confused with that of E. tetragona."

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

common name: Eastern tallerack [n/a]

Council of Heads of Australasian Herbaria (2006), Australian Plant Census: - APC [secondary reference]

taxonomic synonym: Eucalyptus sp. B [n/a]

• APC Comment: Intergrades are recorded between E. extrica and E. pleurocarpa (Nicolle, 2000). This taxon has in the past been referred to as the "green variant" of E. tetragona (Chippendale, 1988). See Nicolle (2000, p. 324) for discussion.
• APC Dist.: WA

George, A.S. (December 2019), On orthography. Australian Systematic Botany Society Newsletter 181: 41 [secondary reference]

• Text: "Eucalyptus extrica: the epithet was used in the adjectival sense 'disentangled, free, referring to the identity of this species being previously confused with that of E. tetragona'; it was said to be from Latin extrico which is a first person singular verb meaning 'I disentangle, free'; the adjectival form would be from the past participle of the verb, extricatus. Note, though, that the imperative singular of the verb is extrica!, i.e. disentangle! which you could say to a plant of a species that is uncertain of its identity. I’m unaware of any epithet formed from this part of speech."

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