{ Vex"il*lar (?), Vex"il*la*ry (?), }[Cf. F.
vexillaire, L. vexillarius a standard bearer.]
1.Of or pertaining to an ensign or
standard.
2.(Bot.)Of or pertaining to the vexillum,
or upper petal of papilionaceous flowers.
Vexilary æstivation(Bot.), a mode of
æstivation in which one large upper petal folds over, and covers, the
other smaller petals, as in most papilionaceous plants.