Sunflower

The Sunflower is a Flower. It can only be obtained through the Flower Minion or winning one in an auction.

Flower minion
The Flower Minion generates Sunflowers.

Bonemeal
If you use bonemeal on the top block of a sunflower, Another sunflower will pop off of the original sunflower. This can be useful for obtaining large amounts of sunflowers without having a flower minion.