Gun tree is the common name for the genus "Eucalyptus".
The gum tree is mostly native to Australia. Yes, there is another name for the gum tree; it is Eucalyptus.
The most common name for the eucalyptus tree is gum tree. This is because eucalyptus trees exude a sticky resin, or gum.
blue gum tree
Eucalyptus is the genera for (Australian) gum trees. They are members of the wider Myrtle family.[But not for rubber trees.]
Eucalyptus
Eucalyptus
babul
Despite its name, no species of gum tree, or eucalyptus, is used in making gum. The "Chewing Gum tree" is the nickname for the Sapodilla tree, which is native to Central and South America. Chewing gum is made from a thick, milky, latex juice called "chicle" which is extracted from the sap of the sapodilla tree.
A cabbage gum is a tree native to Australia, Latin name Eucalyptus amplifolia.
The sweet gum tree gets its name from the aromatic resin it produces, which has a sweet fragrance reminiscent of gum. This resin, known as "gum" or "balsam," exudes from wounds in the bark and was historically used for medicinal purposes and as a chewing gum. The tree's scientific name, Liquidambar styraciflua, also reflects its gum-producing properties.
Eucalyptus papuana F.Muell
Eucalyptus globulus.