Wax flower is a grassy filler flower with tiny blooms that come in pinks, whites, and purple. You can also tint the white with professional flower tint made especially for fresh flowers.
This is a nice alternative to baby's breath when in season.
A single bunch is shown below. This is plenty for accenting corsages and boutonnieres for the average sized wedding (with some left over for bouquets!)
I adore the bright pinks and purples that this sweet filler is available in as well.