多葉卷疊式
Vernation \Ver*na"tion\, n. [F. vernation: cf. L. vernatio the sloughing of the skin of snakes.] (Bot.) The arrangement of the leaves within the leaf bud, as regards their folding, coiling, rolling, etc.; prefoliation.
vernation n : (botany) the arrangement of young leaves in a leaf bud before it opens