Tree Trunks With Mustache & Bow Tie is a gender swapped version of Tree Trunks.
Little is known about Tree Trunks With Mustache & Bow Tie (Male), but in the theme song in the episode "Fionna and Cake," he is shown briefly in the Candy Kingdom.
He later appears in the second gender-swapped episode, "Bad Little Boy," at Lumpy Space Prince's party, trying to impress Ms. Pig by doing the "five finger fillet" with a spoon. He was playing the five finger fillet game with Mrs. Pig where she had a spoon and was tapping it on the ground on both sides of his trunk and Mrs. Pig was watching excitedly and then he hit the spoon on his trunk whick startled them both.
Tree Trunks With Mustache & Bow Tie (Male) is seen with a gray mustache and a green, translucent visor. He has a few wrinkles on his trunk, implying that he is old, like his female counterpart. He also wears a bright blue ribbon on his tail. He has thicker eyebrows than Tree Trunks. It is unknown what his real name is.