Nightshade

Sunflowers are one of the types of flowers appearing in Sunny Side Up.

They have a standard blooming condition, meaning they require more Sunlight than Shade to Bloom.

Their special effect is that while in bloom, they spread Shade to nearby flowers, just like Clouds do.

In Sunny Side Up: Cubed
In the Cubed version of the game, Blooming Nightshades have a range of 1 space.