This flower, rafflesia amoldi , is the largest flower in the world. The corpse flower, which appears larger, is actually made up of many smaller flowers. The rafflesia amoldi plant's blooms can be over three tall. The plant exudes a pungent smell and has no leaves, stems or roots. The large center can hold six to seven quarts of water.
Blue Crown Passion flower. Exotic flowers like these dont have to be limited to tropical gardens. A vigorous perennial vine that climbs via tendrils, the passion flower can be a conversation piece in the garden. Evergreen to about 18 degF. Species vary from subtropical to hardy in USDA Zone 6., this one zone 7. Gorgeous gulf fritillary butterflys larvae love to eat this.