Corymbia torelliana

C. torelliana is known to hybridise with spotted gums, both artificially, and naturally based on recorded spontaneous hybrids between cultivated and native plants (Hill and Johnson, 1995). Moreover, C. torelliana (section Cadagaria) hybridizes readily with three closely related species in the spotted gum group, (section Politaria) Corymbia citriodora subsp. citriodora, C. citriodora subsp. variegata, C. henryi and C. maculata [14–17]. In addition, C. torelliana is able to form hybrids with more distantly related Corymbia species [15].

The tree is dispersed by stingless bees foraging for resin inside the fruit [8–11]. Stingless bees collect plant resins for nest building and defence [12, 13]. Seeds taken up by resin collecting bees may be dispersed long distances (over 300 m), and the tree is invasive in areas outside of its natural range where it co-occurs with stingless bees [8, 10].