Rafflesia arnoldii: Largest single flower, can reach up to 3 feet across.

Titan Arum:

Known as corpse flower, blooms emit a strong, unpleasant odor

Giants Water Lily

Huge lily pads can span over 6 feet in diameter

Amorphophallus titanum

Giant flower with enormous inflorescence, blooms rarely and briefly

Sunflower

Tall sunflowers can have flower heads over 12 inches wide

Hibiscus

Tropical hibiscus varieties feature blooms up to 12 inches across

Canna Lily

Canna lilies produce large, vibrant flowers with petals up to 6 inches

Baobab Tree Flower

Large, white flowers of the baobab can be up to 8 inches

Himalayan Blue Poppy

Striking blue blooms can reach sizes of 8 inches in diameter

Kalanchoe

Certain Kalanchoe species produce large, dense clusters of vibrant flowers

Mexican Sunflower

Large, bright orange flowers with a diameter of up to 8 inches

Echinacea

Coneflowers with large, daisy-like blooms that can reach 6 inches wide