Bachelor's buttons: a sight for sore eyes (quite literally, herbal folk remedies used a decoction of bachelor button flowers as a wash for "tired eyes").
Sometimes known as cornflower because of their tendency to grow as weeds in grain fields, bachelor's buttons earned their current common name from when young bachelors would wear the flower on their vests when they had feelings for a certain person they were courting. The longer the flower lasted, the more it showed them that true love was there.
If the flower faded, however, well--maybe it was time to move on.
Today, it's still worn as a boutonniere, though that certainly won't take away from the awe-striking beauty they can have placed in a simple vase upon your table.
Care for these flowers by trimming their stems upon delivery, and doing so periodically, while changing their water daily. Bachelor's buttons should last over a week with proper care.