The sunflower’s disk is especially impressive, with its smaller ray florets. (Thank you, StinkBreath!)
(By StinkBreath – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=42466401)
Here are two I found on BibliOdyssey, one fanciful, one fine:
Then I searched for another one I had seen in an old book displayed in an Oxford Museum and came across a great collection on plantillustrations.org! Here is one I liked particularly:
Yay for The Sunflower that Roared!
Last, but not least: the wearable Sunflower, Helianthus.