Vernation n. : The arrangement of the leaves within the leaf bud, as regards their folding, coiling, rolling, etc.; prefoliation.

Example:


Taxonomy
Circinate vernation, leaf, frond, new leaves, leaves, free encyclopedia, convolute, involute, fern frond, carnivorous plant, tube, the leaves, search, vernal, spring forth, plant anatomy, arrangement, bundle.

Defination from the web:
Vernation (from vernal meaning spring, since that is when leaves spring forth in temperate regions) is the formation of new leaves or fronds. ... In involute vernation both margins on opposing sides of the leaf are rolled up forming two tubes that meet at the midrib of the leaf. ...