festoon

(noun) a curtain of fabric draped and bound at intervals to form graceful curves.

(noun) an embellishment consisting of a decorative representation of a string of flowers suspended between two points; used on pottery or in architectural work.

(noun) flower chains suspended in curves between points as a decoration. Synonyms: festoonery.

(verb) decorate with strings of flowers. Example: "The public buildings were festooned for the holiday."