VEXILLAR

{ Vex″il‐lar (?), Vex″il‐la‐ry (?), }[[Cf. F. vexillaire, L. vexillarius a standard bearer.]] 1. 1. Of or pertaining to an ensign or standard.
2. 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.