Lanterns work great as centerpieces because you do not need a lot of decoration to go with them. The white lantern with fresh eucalyptus on a wooden disc is simplistic yet beautiful. The style shown here can be just enough if your reception room has a lot of character to begin with.
Gold Wedding Decor, Wedding Centerpieces, Graduation Party Decorations, Glitter Vase, Party Centerpieces, Gold Centerpieces, Set of 3 by LimeAndCo on Etsy https://www.etsy.com/listing/237704576/gold-wedding-decor-wedding-centerpieces
Rustic ranunculus and rose wedding table centerpieces: http://www.stylemepretty.com/little-black-book-blog/2016/11/28/big-sky-montana-destination-wedding/ Photography: Simply Sarah - http://simplysarah.me/
Decorating Your Outdoor Wedding and Reception with Flowers