There is a range of white to pink and carmine flower colour variants that are putative hybrids between C. calophylla and C. ficifolia. Some of these were originally listed as Eucalyptus varieties under one or other species. They include: E. calophylla var. hawkeyi Blakely, commemorating George Hawkey, one-time Curator of the Sydney Royal Bot. Gds, said to be an improved form with larger rosy carmine flowers; E. calophylla var. rubra Guilfoyle; E. ficifolia var. alba Guilfoyle, with white flowers; E. ficifolia var. carminea Blakely, regarded by Pryor & Johnson in A Classification of the Eucalypts (1971) as a minor variant and listed by Chippendale in Flora of Australia, Vol. 19, as a probable hybrid; C. ficifolia var. rosea Guilfoyle. In the wild C. calophylla varies in flower colour from white to pale pink, while C. ficifolia, which usually has crimson flowers, may have near white flowers on cultivated plants. The old botanical names are no longer used and currently there appears to be little attempt to find names for colour variants apart from the pink-flowered 'Rosea'.