%vexillary%

{ }[ Cf. F. vexillaire, L. vexillarius a standard bearer. ] [ 1913 Webster ]

1. Of or pertaining to an ensign or standard. [ 1913 Webster ]

2. (Bot.) Of or pertaining to the vexillum, or upper petal of papilionaceous flowers. [ 1913 Webster ]

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. [ 1913 Webster ]