vernation

/V ER0 N EY1 SH AH0 N/
noun
  1. 1

    The appearance of new leaves.

  2. 2

    The arrangement of multiple organs (such as leaves and flower parts) within a bud.

  3. 3

    Arrangement of only leaves within the bud; prefoliation.

Source: https://en.wiktionary.org/wiki/vernation