01 Of or pertaining to an ensign or standard.
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1.
Of or pertaining to an ensign or standard.
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2.
Of or pertaining to the vexillum, or upper petal of papilionaceous flowers.(Bot.)
Phrases & compounds
Vexilary aestivation —
a mode of aestivation in which one large upper petal folds over, and covers, the other smaller petals, as in most papilionaceous plants.