Ash, oak,elm.
The three letters carved in a tree were CRO.
The name of a tree from the olive family that has three letters is "Fig." Although commonly associated with the fruit, the fig tree (Ficus) is part of the Moraceae family, which includes the olive tree (Olea). If you are specifically looking for a tree from the olive family, the term "olea" itself is often used, but it does not fit the three-letter requirement.
The letters "citcar" can be rearranged to spell "carrot," but that does not refer to a tree. However, if you're looking for a type of tree, the letters can be rearranged to spell "arctic," which is associated with "arctic willow," a type of tree found in cold regions.
the letters when rearranged make the name of the CEDAR tree
Abies
pine
Cedar
cro
· Sapodilla
Mangrove
ornament
No state capital has a total of three letters or just three letters.