circinate

Etymology
From, past participle of.

Adjective

 * 1)  Used of leaves or similar parts that are coiled on themselves from the apex toward their base.
 * 2)  Round or ring-shaped, particularly with distinct margins forming some sort of motive; annular.

Usage notes

 * Most often the term is used in botany with regard to the way a leaf is "packaged" inside a bud.