细叶桉（学名：Eucalyptus tereticornis）为桃金娘科桉属下的一个种。

Eucalyptus tereticornis is a species of tree native to eastern Australia.

Eucalyptus tereticornis has several common names, including forest red gum, bastard box, blue gum, flooded gum, grey gum, mountain gum, Queensland blue gum, red gum, red ironbark, red irongum and slaty gum.