Final answer:
Echinacea is a purple daisy used by Native Americans in a medicinal tea.
Step-by-step explanation:
The purple daisy originally used by Native Americans in a medicinal tea is Echinacea. Echinacea is a herb that has been used for years for its potential immune-boosting and anti-inflammatory properties. It is commonly used to treat common cold symptoms and may have other health benefits as well.
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