What is considered a coneflower...?

Echinacea -- of course. But what about Rudbeckia (black-eyed susans). I see those mentioned in this forum sometimes. Are there others?

I like the family of long flowering, low water requirements once-established, knee-high or better plants.... and have just found Sonora Black-eyed Susans... WOW!

Rudbeckia, Coreopsis, Helenium, Ratibida, Heliopsis, Helianthus, etc.

Check out Helenium 'Mardi Gras' and 'Double Trouble' too!

THANKS. I have an 8x8 bed each of Corepsis Jethro Tull and Coreopsis Morning Sunrise -- very cool plants.

Will check out the suggestions as well.