My mother-in-law has two beautiful rosemary bushes in her garden. Last time we visited her I just 
couldn't help myself - I just had to have a few of those fragrant small twigs! Rosemary is such a gorgeous and beautiful plant. Bind a few small twigs together with a bit of lace ribbon and attach a small tag with your guests name and table number in it. Display the small bunches on a tray or pin them up on a notice board covered in material of your choice. 
A sweet and rustic way to display escort cards.