You searched for: “vernation
vernation (s) (noun), vernations (pl)
In botany, the arrangement of young leaves in a leaf bud before it opens: The coiled arrangement of young leaves in fern fiddleheads is known as vernation or "circinate" vernation and protects the delicate leaf tips as they develop.

This entry is located in the following unit: vern-, vernal- (page 1)