What is the name of the leafy figure paraded on May Day in some English towns?

The leafy figure paraded on May Day in some English towns is called Jack in the Green.

Jack in the Green is a person concealed beneath a tall pyramidal or conical framework covered with greenery, leaves, and flowers. The figure appears in May Day processions and is often accompanied by musicians, dancers, or other traditional characters.

The custom developed in England during the 18th century from earlier May Day processions in which milkmaids carried decorated pails or elaborate floral displays. By the 19th century, Jack in the Green had become especially associated with chimney sweeps, whose May Day celebrations could include costumes, music, and rowdy street performances.

The tradition declined in the early 20th century but was revived by local folk and Morris groups from the 1970s onward. Jack in the Green is not simply another name for the Green Man, a much older mythological and artistic figure; nor is it the same as a May Queen, who is a human ceremonial representative.