Dried herbs, roots, bark, and other plant parts used in essential oil extraction, pharmaceutical formulation, or pest control — when not classifiable under a more specific heading — fall into this broad residual category. USDA APHIS phytosanitary requirements govern entry of unprocessed plant material, and FDA may assert jurisdiction over material destined for drug, supplement, or cosmetic applications. The dual regulatory exposure (APHIS at the border for plant health, FDA for end-use compliance) means importers often coordinate documentation across two agencies before a shipment clears. Correct classification depends on demonstrating that the plant material's primary commercial use is in perfumery, pharmacy, or a similar functional application rather than as food or feed.

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