You know what it looks like… but what is it called?
TAKE THE QUIZ“old-man's”
The following 4 entries include the term old-man's.
old-man's beard
noun: any of several clematises (especially Clematis vitalba) having plumose styles
old-man's-flannel
nounold-man's-pepper
nounold-man's-root
noun: the American spikenard (Aralia racemosa)
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Merriam-Webster unabridged