(botany) Arrangement of only leaves within the bud; prefoliation.
Origin of vernation
New Latin vērnātiōvērnātiōn-from Latin vērnātuspast participle ofvērnāreto flourishfromvērnusvernalvernal
American Heritage Dictionary of the English Language, 5th Edition
Vernation Sentence Examples
The Monandreae have been subdivided into twenty-eight tribes, the characters of which are based on the structure of the anther and pollinia, the nature of the inflorescence, whether terminal or lateral, the vernation of the leaf and the presence or absence of a joint between blade and sheath, and the nature of the stem.
In botany the word is used of the praefloration or folded arrangement of the petals in a flower before expansion in the summer, contrasted with "vernation" of leaves which unfold in the spring.
The arrangement of the leaves in the bud is termed vernation or prefoliation.
In considering vernation we must take into account both the manner in which each individual leaf is folded and also the arrangement of the leaves in relation to each other.
The leaves in the bud are either placed simply in apposition, as in the mistletoe, or they are folded or rolled up longitudinally or laterally, giving rise to different kinds of vernation, as delineated in figs.