Common in open, sunny locations, blooms all spring and summer.
An Assasin Bug roams an Annual sunflower blossom hoping for a meal.

Mature leaves have pink viening

Annual sunflowers can grow over 7 feet tall in the Central Valley. (My nephew, Daniel Benoy, is almost 6 feet tall, and not exactly thrilled to pose as a "flowerchild" for me! Thanks, Dan.)