annular corona
Raised fleshy tissue, usually in a ring, on the corolla around the base of the staminal column but not closely adnate to it.
GardenWeb Glossary of Botanical Terms
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Annular Ring-like; said of leaf scars that encircle the bud, or bundle scars that are circular with an opening in the center.
Anterior On the front side, away from the axis, toward the subtending bract.
(2) Growth rings (or 'tree rings' or 'annular rings') can be seen in a horizontal cross section cut through the trunk of a tree.
 See also: Plant
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