Nothing makes a cool, sophisticated statement quite like white blooms. Down the aisle and on your tables, they seduce with low-key glamour. Using just two flowers streamlines tables; here, ranunculus get cozy with fluttering sweet peas. “Modern” floral design by Paula Arakas, Posy Floral Design, NYC; posyflowers.com. $400 (with vase, $545). Aalto vase, Iittala; aalto.com.