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What Is Supima Cotton? A Clear Consumer Guide Supima cotton is trademarked, American-grown Pima cotton from the species Gossypium barbadense, verified through licensed supply chains and third-party forensic testing rather than just a marketing name. It is not a different plant from regular Pima. It is a legally protected, audited version of it. Here’s what actually defines the term: Species: Gossypium barbadense, the extra-long-staple cotton plant, not the upland cotton (Gossypium hirsutum) used in most everyday clothing. Trademark: SUPIMA® is owned and licensed by the Supima trade associati …