maypole (n.)youdaoicibaDictYouDict[maypole 词源字典]
"high striped pole decorated with flowers and ribbons for May Day merrymakers to dance around," attested from 1550s but certainly much older, as the first mention of it is in an ordinance banning them, and there are references to such erections, though not by this name, from a mid-14c. Welsh poem. See May Day.[maypole etymology, maypole origin, 英语词源]