An·nu·lar·ia
| \ ˌanyəˈla(a)rēə \
Definition of Annularia
: a large genus of fossil pteridophytic plants of the order Equisetales having annuli formed by the basal sheaths of the leaf whorls
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Merriam-Webster unabridged
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Time Traveler for Annularia
The first known use of Annularia was in 1830
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