Vex"il*lar (?), Vex"il*la*ry (?),[Cf. F. vexillaire, L. vexillarius a standard bearer.]
Of or pertaining to an ensign or standard.
Of or pertaining to the vexillum, or upper petal of papilionaceous flowers.
Vexilary aestivation Bot., a mode of aestivation in which one large upper petal folds over, and covers, the other smaller petals, as in most papilionaceous plants.
© Webster 1913.