the.com/boutonniere

A flower pinned to a lapel so men can also peak too soon, formally.

means A small flower or spray of flowers worn pinned through the buttonhole or on the lapel of a jacket.

from From French boutonnière, literally 'buttonhole,' from bouton ('button'). The word originally named the slit itself, then slid over to mean the flower stuck through it — a case of the hole lending its name to the thing that fills it.

origin
French for buttonhole, which it literally pins into
placement
traditionally worn on the left lapel, over the heart
matching rule
meant to echo the bouquet, not the tie
lifespan
wilts faster than most wedding speeches
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