Paper lanterns as light-up centerpieces--inexpensive idea. Slip a Vase in the middle of each lantern and add flowers of choice. OR just adhere silk flowers to top edge of lantern.Put BATTERY OPERATED CANDLES/lighting inside and around each lantern.
A bud vase filled with water, a wide flower (real or silk), and a small tealight. This looks like spring or country-simple, but you can do whatever flower you want (and tealight) as long as it creates a wide enough base for the candle.
Alternative to tossing the bouquet. Tie it and have each "eligible" lady hold their own ribbon. The bride cuts the ribbons, one by one. The last lady with her ribbon uncut gets the bouquet! (Ideas for incorporating moms dress?