Maximilian's sunflower (Helianthus maximiliani)

Maximilian's sunflower photograph

Perennial, to 6 feet tall, grows in colonies. White-hairy stems. Distinctive narrow, folded leaves curve downward. Clusters of 4 inch, yellow-rayed flower heads near top of plant. Very common. Named after its discoverer, a German prince. Wet to mesic prairies. Blooms July-August.