Specifically, the genus Helianthus to separate out the other “sunflower” plants.
Only found in North America. So tall and glorious that we have adopted many for our gardens. Thrusting skyward they telegraph their supply of pollen and nectar to the bees that only feed their young pollen of Sunflower. Here is one of them. The appropriately named A. helainthi. How nice that it was found tucked in Hartville, OH by MaLisa Spring. Photo by Anders Croft.