Blue Gum sometimes refers to the subspecies or the species in Eucalyptus globulus complex, however it may also refer to a number of other species of Eucalyptus in Australia. Confusingly, in Queensland it usually refers to Eucalyptus tereticornis, which is known elsewhere as Forest Red Gum.
- Gippsland Blue Gum: Eucalyptus pseudoglobulus (syn. E. globulus subsp. pseudoglobulus)
- Inland Blue Gum: E. leucoxylon
- Large-fruited Blue Gum: E. leucoxylon
- Mountain Blue Gum: E. cypellocarpa, E. deanei
- Round-leaved Blue Gum: E. deanei
- South Australian Blue Gum: E. leucoxylon
- Southern Blue Gum: Eucalyptus bicostata (syn. E. globulus subsp. bicostata)
- Spotted Blue Gum: Eucalyptus maidenii (syn. E. globulus subsp. maidenii)
- Sydney Blue Gum: E. saligna
- Tasmanian Blue Gum: Eucalyptus globulus (syn. E. globulus subsp. globulus)
Other species are sometimes regarded as blue gums such as E. nitens, and the Sydney Blue Gum (E. notabilis),
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“The hunchback on the corner, with gum and shoelaces,
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—Robert Penn Warren (1905–1989)