I am a vibrant plant often associated with summer. I am known for my showy, large flowers that come in a variety of colors, and some varieties can grow quite tall. My petals can be single or double layered, and my seeds are edible. What am I?

1. My name is derived from the sun.
2. My seeds are often eaten as a snack or pressed for oil.
3. I am a popular subject for artists and photographers.
4. Different varieties can be used for both ornamental purposes and agricultural production.