All Tulips offer a basic cup shape that shows off the sides of the petals. A dark or light colored center contrasts against the petals and can symbolize a broken or light heart respectively. The flower has been in cultivation since the 13th century, but it really took off in the 1600s when Turkish traders introduced it to the Dutch. The Tulip crazes in the 17th century became so fevered that the bulbs were traded as currency and theft of the flowers triggered harsh penalties. Now the bulbs are available in grocery and home improvement stores for a just a few dollars.