SINCE 1828
perianth
noun
peri·anth
| \ ˈper-ē-ˌan(t)th
\
\
Definition of perianth
: the floral structure comprised of the calyx and corolla especially when the two whorls are fused — see flower illustration
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From the Editors at Merriam-Webster
Opening Up on the Names of Flower Parts
Opening Up on the Names of Flower Parts
Stopping to smell (and examine) the roses
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The first known use of perianth was circa 1806
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