What is "echinacea"?

I love taking echinacea to boost my immune system and it’s a beautiful flower too

The Indigious People of this country where well versed, at least the 'Medicine Man' was, in the art of healing with such...

The picture gives it away...

I hit the wrong button, sit happens

When looking at the answers I was surprised that sea urchin was not amongst them. Then I read the explanation and it clicked 😅