Pompon Dahlia (Dahlia variabilis pompon)

Blossoms in every color imaginable make dahlia flowers a gardener's favorite. On this pom-pom-shaped variety, look at how each petal is shaped and placed so uniformly in a near-perfect sphere. It's so satisfyingly organized, and—if you can say this about a flower—tidy. They're also mini (only two inches across), which automatically makes them adorable.