- 1. Alt. of Vexillary Source: opted
- 2. 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. Source: webster
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vexillar
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botpapilionaceouspertainingpetaluppervexillaryvexillumaltcoversensignflowersfoldslargemodepetalsplantssmallerstandard